diff --git a/ext/standard/array.c b/ext/standard/array.c
index 335b4d54a27..eae2cf6b909 100644
--- a/ext/standard/array.c
+++ b/ext/standard/array.c
@@ -2209,7 +2209,15 @@ static void php_array_merge_wrapper(INTERNAL_FUNCTION_PARAMETERS, int recursive)
 		efree(args);
 		WRONG_PARAM_COUNT;
 	}
-	
+
+	for (i=0; i<argc; i++) {
+		if (Z_TYPE_PP(args[i]) != IS_ARRAY) {
+			php_error_docref(NULL TSRMLS_CC, E_WARNING, "Argument #%d is not an array", i+1);
+			efree(args);
+			return;
+		}
+	}
+
 	array_init(return_value);
 	
 	for (i=0; i<argc; i++) {