1 files changed, 1 insertions, 1 deletions

diff --git a/cgit.c b/cgit.c
index fd341b8..b3a98c1 100644
--- a/cgit.c
+++ b/cgit.c
@@ -22,5 +22,5 @@ struct cgit_filter *new_filter(const char *cmd, int extra_args)
 	struct cgit_filter *f;
 
-	if (!cmd)
+	if (!cmd || !cmd[0])
 		return NULL;