1 files changed, 2 insertions, 1 deletions

diff --git a/ui-shared.c b/ui-shared.c
index 209af6e..4280a70 100644
--- a/ui-shared.c
+++ b/ui-shared.c
@@ -518,7 +518,8 @@ void add_hidden_formfields(int incl_head, int incl_search, char *page)
                 html_hidden("url", url);
         }
 
-        if (incl_head && strcmp(ctx.qry.head, ctx.repo->defbranch))
+        if (incl_head && ctx.qry.head && ctx.repo->defbranch &&
+            strcmp(ctx.qry.head, ctx.repo->defbranch))
                 html_hidden("h", ctx.qry.head);
 
         if (ctx.qry.sha1)