diff --git a/jerry-core/jerry.cpp b/jerry-core/jerry.cpp
index 380e69a21..e8cf6c103 100644
--- a/jerry-core/jerry.cpp
+++ b/jerry-core/jerry.cpp
@@ -80,7 +80,7 @@ jerry_api_convert_ecma_value_to_api_value (jerry_api_value_t *out_value_p, /**<
   {
     out_value_p->type = JERRY_API_DATA_TYPE_UNDEFINED;
   }
-  if (ecma_is_value_null (value))
+  else if (ecma_is_value_null (value))
   {
     out_value_p->type = JERRY_API_DATA_TYPE_NULL;
   }