format-patch: improve head calculation for cover-letter

diff --git a/http.c b/http.c
index d9d1aad3be468394e39966c0b45e7e101b387b0c..8803c70825ac8aefb619b6c56d6015573eb5d227 100644 (file)
--- a/http.c
+++ b/http.c
@@ -5,6 +5,7 @@
 #include "url.h"
 #include "credential.h"
 #include "version.h"
+#include "pkt-line.h"
 
 int active_requests;
 int http_is_verbose;