diff --git a/core/hash_map.h b/core/hash_map.h
index 38da1d59ab9..edc67e78062 100644
--- a/core/hash_map.h
+++ b/core/hash_map.h
@@ -210,6 +210,7 @@ private:
 		e->next = hash_table[index];
 		e->hash = hash;
 		e->pair.key = p_key;
+		e->pair.data = TData();
 
 		hash_table[index] = e;
 		elements++;
diff --git a/core/vmap.h b/core/vmap.h
index fde9723d716..ed66b46993e 100644
--- a/core/vmap.h
+++ b/core/vmap.h
@@ -196,8 +196,7 @@ public:
 
 		int pos = _find_exact(p_key);
 		if (pos < 0) {
-			V val;
-			pos = insert(p_key, val);
+			pos = insert(p_key, V());
 		}
 
 		return _cowdata.get_m(pos).value;