diff --git a/src/Mod/Part/App/GeometryBoolExtensionPyImp.cpp b/src/Mod/Part/App/GeometryBoolExtensionPyImp.cpp
index 098fb28f44..7d46390eac 100644
--- a/src/Mod/Part/App/GeometryBoolExtensionPyImp.cpp
+++ b/src/Mod/Part/App/GeometryBoolExtensionPyImp.cpp
@@ -34,7 +34,7 @@ using namespace Part;
 std::string GeometryBoolExtensionPy::representation(void) const
 {
     std::stringstream str;
-    double val = getGeometryBoolExtensionPtr()->getValue();
+    bool val = getGeometryBoolExtensionPtr()->getValue();
     str << "<GeometryBoolExtension (" ;
 
     if(getGeometryBoolExtensionPtr()->getName().size()>0)