diff --git a/src/Mod/Assembly/Gui/ViewProviderAssembly.cpp b/src/Mod/Assembly/Gui/ViewProviderAssembly.cpp
index 55d15ac5b..7dd53f5ef 100644
--- a/src/Mod/Assembly/Gui/ViewProviderAssembly.cpp
+++ b/src/Mod/Assembly/Gui/ViewProviderAssembly.cpp
@@ -37,7 +37,7 @@
 
 using namespace AssemblyGui;
 
-extern Assembly::ItemAssembly* ActiveAsmObject;
+extern Assembly::Item* ActiveAsmObject;
 
 PROPERTY_SOURCE(AssemblyGui::ViewProviderItemAssembly,AssemblyGui::ViewProviderItem)