diff --git a/bitbake/lib/bb/fetch2/hg.py b/bitbake/lib/bb/fetch2/hg.py
index ad6e85d..31ba1cf 100644
--- a/bitbake/lib/bb/fetch2/hg.py
+++ b/bitbake/lib/bb/fetch2/hg.py
@@ -82,7 +82,12 @@ class Hg(FetchMethod):
 
         basecmd = data.expand('${FETCHCMD_hg}', d)
 
-        proto = ud.parm.get('proto', 'http')
+        proto = ud.parm.get('protocol', 'http')
+
+        if ud.parm.get('proto') is not None:
+            logger.warn('Update %s recipe to use "protocol" not "proto".', d.getVar('PN', True))
+            # Use proto value for now
+            proto =  ud.parm.get('proto')
 
         host = ud.host
         if proto == "file":