diff --git a/autogen.sh b/autogen.sh
index 40d0c37b11..860d980c95 100755
--- a/autogen.sh
+++ b/autogen.sh
@@ -317,7 +317,7 @@ hooks=
 # Configure 'git diff' hunk header format.
 
 git_config diff.elisp.xfuncname \
-	   '^\(def[^[:space:]]+[[:space:]]+([^()[:space:]]+)'
+           '^\([^[:space:]]+[[:space:]]+([^()[:space:]]+)'
 git_config 'diff.m4.xfuncname' '^((m4_)?define|A._DEFUN(_ONCE)?)\([^),]*'
 git_config 'diff.make.xfuncname' \
 	   '^([$.[:alnum:]_].*:|[[:alnum:]_]+[[:space:]]*([*:+]?[:?]?|!?)=|define .*)'