diff --git a/common/zmaxheap.c b/common/zmaxheap.c
index d4e35e9b..a4d15a22 100644
--- a/common/zmaxheap.c
+++ b/common/zmaxheap.c
@@ -393,8 +393,8 @@ void zmaxheap_test()
             }
 
 
-            int32_t outv;
-            float outfv;
+            int32_t outv = 0;
+            float outfv = 0;
             int res = zmaxheap_remove_max(heap, &outv, &outfv);
             if (sz == 0) {
                 assert(res == 0);