diff --git a/bin/git-summary b/bin/git-summary
index 7014f09..d1333c2 100755
--- a/bin/git-summary
+++ b/bin/git-summary
@@ -3,14 +3,16 @@
 COMMITISH=""
 test $# -ne 0 && COMMITISH=$@
 project=${PWD##*/}
-commit_count=`git log --oneline | wc -l | tr -d ' '`
+commit_count=`git log --oneline $COMMITISH | wc -l | tr -d ' '`
 file_count=`git ls-files | wc -l | tr -d ' '`
 authors=`git shortlog -n -s $COMMITISH`
 
 echo
 echo " project: $project"
 echo " commits: $commit_count"
-echo " files  : $file_count"
+if test "$COMMITISH" = ""; then
+    echo " files  : $file_count"
+fi
 echo " authors: "
 echo "$authors"
 echo