diff --git a/src/create.c b/src/create.c
index 0a01b8c..46866bc 100644
--- a/src/create.c
+++ b/src/create.c
@@ -42,14 +42,17 @@ var makeInstance(typeinfo_t* type, ...)
     obj = objAlloc(type, type->dataSize(ap1));
     va_end(ap1);
 
-    if (obj != NULL) {
-        rc = type->init(obj, ap);
+    if (obj == NULL) {
+        va_end(ap);
+        return NULL;
     }
+  
+    rc = type->init(obj, ap);
 
     va_end(ap);
 
     if (rc < 0) {
-        destroy(obj);
+        destroy(RTTI_OBJ_TO_DATA(void, obj));
         return NULL;
     }