1 files changed, 3 insertions, 0 deletions
diff --git a/handler.c b/handler.c
index acef8f77..830bda2c 100644
--- a/handler.c
+++ b/handler.c
@@ -86,6 +86,9 @@ handler_free (handler_t *h) {
 
 int
 handler_push (handler_t *h, uint32_t id, uintptr_t ctx, uint32_t p1, uint32_t p2) {
+    if (!h) {
+        return -1;
+    }
     if (!h->mfree) {
         return -1;
     }