am: improve author-script error reporting

diff --git a/builtin/fmt-merge-msg.c b/builtin/fmt-merge-msg.c
index 268f0c20ca8a17ae595ca363e421c0f814be956a..59a40342b675130de6a2ddd76451bff8818e9623 100644 (file)
--- a/builtin/fmt-merge-msg.c
+++ b/builtin/fmt-merge-msg.c
@@ -12,6 +12,7 @@
 #include "fmt-merge-msg.h"
 #include "gpg-interface.h"
 #include "repository.h"
+#include "commit-reach.h"
 
 static const char * const fmt_merge_msg_usage[] = {
        N_("git fmt-merge-msg [-m <message>] [--log[=<n>] | --no-log] [--file <file>]"),