diff --git a/src/Mod/Fem/femsolver/elmer/sifio.py b/src/Mod/Fem/femsolver/elmer/sifio.py
index b2cff1ab2853..1502da4b5a3c 100644
--- a/src/Mod/Fem/femsolver/elmer/sifio.py
+++ b/src/Mod/Fem/femsolver/elmer/sifio.py
@@ -262,7 +262,7 @@ def __delitem__(self, key):
     def __iter__(self):
         return self._attrs.items()
 
-    def iterkeys(self):
+    def keys(self):
         return self._attrs.keys()
 
     def __contains__(self, item):