diff --git a/share/qtcreator/debugger/lldbbridge.py b/share/qtcreator/debugger/lldbbridge.py
index 76f7d3729fe..7d8476f9e01 100644
--- a/share/qtcreator/debugger/lldbbridge.py
+++ b/share/qtcreator/debugger/lldbbridge.py
@@ -934,7 +934,7 @@ class Dumper(DumperBase):
 
     def putSubItem(self, component, value, tryDynamic=True):
         if not value.IsValid():
-            warn("INVALID SUBITEM: %s" % value.GetName())
+            self.warn("INVALID SUBITEM: %s" % value.GetName())
             return
         with SubItem(self, component):
             self.putItem(value, tryDynamic)