diff --git a/share/qtcreator/debugger/gdbbridge.py b/share/qtcreator/debugger/gdbbridge.py
index bff53dfc63e16453c5222cbbe2db38f8785f1bd5..d8d8908725c4006818691a2d7d95daacaf2e0013 100644
--- a/share/qtcreator/debugger/gdbbridge.py
+++ b/share/qtcreator/debugger/gdbbridge.py
@@ -891,7 +891,9 @@ class Dumper(DumperBase):
         return 4
 
     def ptrSize(self):
-        return self.lookupType('void*').sizeof
+        self.cachedPtrSize = self.lookupType('void*').sizeof
+        self.ptrSize = lambda: self.cachedPtrSize
+        return self.cachedPtrSize
 
     def createValue(self, address, referencedType):
         try: