diff --git a/etc/committer.scm.in b/etc/committer.scm.in
index 7991dc7430..801b5d195e 100755
--- a/etc/committer.scm.in
+++ b/etc/committer.scm.in
@@ -90,6 +90,7 @@ LINE-NO in PORT."
   "Read the diff and return a list of <hunk> values."
   (let ((port (open-pipe* OPEN_READ
                           "git" "diff"
+                          "--no-color"
                           "--no-prefix"
                           ;; Only include one context line to avoid lumping in
                           ;; new definitions with changes to existing