diff --git a/src/detect-parse.c b/src/detect-parse.c
index b5e214df24..c3232b97da 100644
--- a/src/detect-parse.c
+++ b/src/detect-parse.c
@@ -1540,6 +1540,7 @@ Signature *SigAlloc (void)
 
     sig->init_data->buffers = SCCalloc(8, sizeof(SignatureInitDataBuffer));
     if (sig->init_data->buffers == NULL) {
+        SCFree(sig->init_data);
         SCFree(sig);
         return NULL;
     }