diff --git a/ext/standard/uniqid.c b/ext/standard/uniqid.c
index 9d692387032..304e1425023 100644
--- a/ext/standard/uniqid.c
+++ b/ext/standard/uniqid.c
@@ -61,8 +61,8 @@ PHP_FUNCTION(uniqid)
 #if HAVE_USLEEP && !defined(PHP_WIN32)
 	if (!more_entropy) {
 #if defined(__CYGWIN__)
-		php_error_docref(NULL TSRMLS_CC, E_ERROR, "You must use 'more entropy' under CYGWIN.");
-		return;
+		php_error_docref(NULL TSRMLS_CC, E_WARNING, "You must use 'more entropy' under CYGWIN.");
+		RETURN_FALSE;
 #else
 		usleep(1);
 #endif