diff --git a/bin/git-summary b/bin/git-summary
index 8b69000..33f21be 100755
--- a/bin/git-summary
+++ b/bin/git-summary
@@ -48,7 +48,7 @@ file_count() {
 #
 
 authors() {
-  git shortlog -n -s $commit | awk '
+  git shortlog -n -s $commit | LC_ALL=C awk '
   { args[NR] = $0; sum += $0 }
   END {
     for (i = 1; i <= NR; ++i) {
@@ -69,7 +69,8 @@ repository_age() {
 # summary
 
 if test "$1" = "--line"; then
-  git line-summary
+  shift
+  git line-summary "$@"
   echo
 else