diff --git a/mmengine/utils/path.py b/mmengine/utils/path.py
index c1228f13b1f681821b4b4e364b472b796953e45c..b08feb7d08c9581fdee3d48263151df88f680565 100644
--- a/mmengine/utils/path.py
+++ b/mmengine/utils/path.py
@@ -110,7 +110,7 @@ def is_abs(path: str) -> bool:
     Returns:
         bool: whether path is an absolute path.
     """
-    if osp.isabs(path) or path.startswith(('http', 'https', 's3')):
+    if osp.isabs(path) or path.startswith(('http://', 'https://', 's3://')):
         return True
     else:
         return False