diff --git a/.github/workflows/linux-arm.yml b/.github/workflows/linux-arm.yml
index e54dbcf31..f8c21797b 100644
--- a/.github/workflows/linux-arm.yml
+++ b/.github/workflows/linux-arm.yml
@@ -23,9 +23,9 @@ jobs:
         CC: arm-linux-gnueabihf-gcc
       run: ./make.sh --xc-host='sbcl --dynamic-space-size 700MB --lose-on-corruption --disable-ldb --disable-debugger' --arch=arm
 
-    # - name: test
-    #   env:
-    #     CC: arm-linux-gnueabihf-gcc
-    #   run: cd tests; ./run-tests.sh
+    - name: test
+      env:
+        CC: arm-linux-gnueabihf-gcc
+      run: cd tests; ./run-tests.sh
     - name: ansi-test
       run: cd tests; ./ansi-tests.sh
diff --git a/contrib/sb-grovel/def-to-lisp.lisp b/contrib/sb-grovel/def-to-lisp.lisp
index 878a4bd0e..6cca9b094 100644
--- a/contrib/sb-grovel/def-to-lisp.lisp
+++ b/contrib/sb-grovel/def-to-lisp.lisp
@@ -197,6 +197,8 @@ code:
        (split-cflags (sb-ext:posix-getenv "EXTRA_CFLAGS"))
        #+(and linux largefile)
        '("-D_LARGEFILE_SOURCE" "-D_LARGEFILE64_SOURCE" "-D_FILE_OFFSET_BITS=64")
+       #+64-bit-time
+       '("-D_TIME_BITS=64")
        #+(and (or x86 ppc sparc) (or linux freebsd)) '("-m32")
        #+(and x86-64 darwin inode64)
        `("-arch" "x86_64" ,(format nil "-mmacosx-version-min=~A"
diff --git a/contrib/sb-posix/constants.lisp b/contrib/sb-posix/constants.lisp
index 9883757ff..ff566fc5e 100644
--- a/contrib/sb-posix/constants.lisp
+++ b/contrib/sb-posix/constants.lisp
@@ -424,7 +424,8 @@
  ;; utime(), utimes()
  #-win32
  (:type suseconds-t ; OAOOM warning: similar kludge in tools-for-build
-        #+os-provides-suseconds-t "suseconds_t"
+        #+(and os-provides-suseconds-t 64-bit-time) "__suseconds64_t"
+        #+(and os-provides-suseconds-t (not 64-bit-time)) "suseconds_t"
         #-os-provides-suseconds-t "long")
 
  #-win32
@@ -436,7 +437,9 @@
  (:structure alien-timeval
              ("struct timeval"
               (time-t sec "time_t" "tv_sec")
-              (suseconds-t usec "suseconds_t" "tv_usec")))
+              (suseconds-t usec #+64-bit-time "__suseconds64_t"
+                                #-64-bit-time "suseconds_t"
+                                "tv_usec")))
 
  (:integer veof "VEOF" nil t)
  (:integer veol "VEOL" nil t)
diff --git a/contrib/sb-posix/interface.lisp b/contrib/sb-posix/interface.lisp
index a56b19761..9e808873c 100644
--- a/contrib/sb-posix/interface.lisp
+++ b/contrib/sb-posix/interface.lisp
@@ -908,7 +908,8 @@ not supported."
 (progn
   (export 'time :sb-posix)
   (defun time ()
-    (let ((result (alien-funcall (extern-alien "time"
+    (let ((result (alien-funcall (extern-alien #-64-bit-time "time"
+                                               #+64-bit-time "__time64"
                                                (function time-t (* time-t)))
                                  nil)))
       (if (minusp result)
@@ -916,18 +917,19 @@ not supported."
           result)))
   (export 'utime :sb-posix)
   (defun utime (filename &optional access-time modification-time)
-  (with-alien ((fun (function int (c-string :not-null t) (* alien-utimbuf))
-                    :extern #-netbsd "utime" #+netbsd "_utime"))
-    (let ((name (filename filename)))
-      (if (not (and access-time modification-time))
-          (alien-funcall fun name nil)
-          (with-alien ((utimbuf (struct alien-utimbuf)))
-            (setf (slot utimbuf 'actime) (or access-time 0)
-                  (slot utimbuf 'modtime) (or modification-time 0))
-            (let ((result (alien-funcall fun name (alien-sap utimbuf))))
-              (if (minusp result)
-                  (syscall-error 'utime)
-                  result)))))))
+    (with-alien ((fun (function int (c-string :not-null t) (* alien-utimbuf))
+                      :extern #-(or 64-bit-time netbsd) "utime" #+netbsd "_utime"
+                      #+64-bit-time "__utime64"))
+      (let ((name (filename filename)))
+        (if (not (and access-time modification-time))
+            (alien-funcall fun name nil)
+            (with-alien ((utimbuf (struct alien-utimbuf)))
+              (setf (slot utimbuf 'actime) (or access-time 0)
+                    (slot utimbuf 'modtime) (or modification-time 0))
+              (let ((result (alien-funcall fun name (alien-sap utimbuf))))
+                (if (minusp result)
+                    (syscall-error 'utime)
+                    result)))))))
   (export 'utimes :sb-posix)
   (defun utimes (filename &optional access-time modification-time)
     (flet ((seconds-and-useconds (time)
@@ -938,22 +940,22 @@ not supported."
              (if (minusp value)
                  (syscall-error 'utimes)
                  value)))
-   (with-alien ((fun (function int (c-string :not-null t) (* (array alien-timeval 2)))
-                     :extern #-netbsd "utimes" #+netbsd "sb_utimes"))
-     (let ((name (filename filename)))
-        (if (not (and access-time modification-time))
-            (maybe-syscall-error (alien-funcall fun name nil))
-            (with-alien ((buf (array alien-timeval 2)))
-              (let ((actime (deref buf 0))
-                    (modtime (deref buf 1)))
-                (setf (values (slot actime 'sec)
-                              (slot actime 'usec))
-                      (seconds-and-useconds (or access-time 0))
-                      (values (slot modtime 'sec)
-                              (slot modtime 'usec))
-                      (seconds-and-useconds (or modification-time 0)))
-                (maybe-syscall-error (alien-funcall fun name
-                                                    (alien-sap buf)))))))))))
+      (with-alien ((fun (function int (c-string :not-null t) (* (array alien-timeval 2)))
+                        :extern #-(or netbsd 64-bit-time) "utimes" #+(or netbsd 64-bit-time) "sb_utimes"))
+        (let ((name (filename filename)))
+          (if (not (and access-time modification-time))
+              (maybe-syscall-error (alien-funcall fun name nil))
+              (with-alien ((buf (array alien-timeval 2)))
+                (let ((actime (deref buf 0))
+                      (modtime (deref buf 1)))
+                  (setf (values (slot actime 'sec)
+                                (slot actime 'usec))
+                        (seconds-and-useconds (or access-time 0))
+                        (values (slot modtime 'sec)
+                                (slot modtime 'usec))
+                        (seconds-and-useconds (or modification-time 0)))
+                  (maybe-syscall-error (alien-funcall fun name
+                                                      (alien-sap buf)))))))))))
 
 
 ;;; environment
diff --git a/tests/gc.impure.lisp b/tests/gc.impure.lisp
index 78ee907e5..085025ff6 100644
--- a/tests/gc.impure.lisp
+++ b/tests/gc.impure.lisp
@@ -422,7 +422,7 @@
                              #+win32
                              (alien-funcall (extern-alien "Sleep" (function void int))  300)
                              #-win32
-                             (alien-funcall (extern-alien "sb_nanosleep" (function void int int)) 0 300000000)
+                             (alien-funcall (extern-alien "sb_nanosleep" (function void sb-unix:time-t int)) 0 300000000)
                              (values a b c d e f g h i j k l m))))
          (thr (sb-thread:make-thread (lambda ()
                                        (let ((args #1=(list (LIST 'A) (LIST 'B) (LIST 'C)
diff --git a/tests/sleepytests.pure.lisp b/tests/sleepytests.pure.lisp
index 48d52ebcf..76fe6215a 100644
--- a/tests/sleepytests.pure.lisp
+++ b/tests/sleepytests.pure.lisp
@@ -8,7 +8,8 @@
 ;;; SLEEP should not cons except on 32-bit platforms when
 ;;; (> (mod seconds 1) (* most-positive-fixnum 1e-9))
 (with-test (:name (sleep :non-consing)
-            :serial t :skipped-on :interpreter)
+            :serial t :skipped-on :interpreter
+            :fails-on (and :arm :64-bit-time))
   (handler-case (sb-ext:with-timeout 5
                   (ctu:assert-no-consing (sleep 0.00001s0))
                   (locally (declare (notinline sleep))
diff --git a/tools-for-build/64-bit-time-test.c b/tools-for-build/64-bit-time-test.c
new file mode 100644
index 000000000..edf5147f7
--- /dev/null
+++ b/tools-for-build/64-bit-time-test.c
@@ -0,0 +1,8 @@
+#include <time.h>
+
+int main ()
+{
+    if (sizeof( time_t) == 8)
+        return 104;
+    return 1;
+}
diff --git a/tools-for-build/grovel-features.sh b/tools-for-build/grovel-features.sh
index 522ebc58c..6265439b6 100644
--- a/tools-for-build/grovel-features.sh
+++ b/tools-for-build/grovel-features.sh
@@ -52,6 +52,13 @@ featurep os-provides-close-range-wrapper
 
 featurep os-provides-posix-spawn
 
+if [ "$sbcl_os" = linux ] ; then
+    case "$sbcl_arch" in
+        arm | x86 | ppc | mips | sparc | riscv32)
+            featurep 64-bit-time
+    esac
+fi
+
 if [ "$sbcl_arch" = arm ] ; then
    featurep arm-softfp
 fi
diff --git a/tools-for-build/os-provides-suseconds-t-test.c b/tools-for-build/os-provides-suseconds-t-test.c
index 5fcd72572..d4d5874fb 100644
--- a/tools-for-build/os-provides-suseconds-t-test.c
+++ b/tools-for-build/os-provides-suseconds-t-test.c
@@ -1,4 +1,3 @@
-/* test to build and run so that we know if we have blksize_t */
 
 #include <sys/types.h>