diff --git a/src/libs/extensionsystem/CMakeLists.txt b/src/libs/extensionsystem/CMakeLists.txt
index fd3345ff789..71e5cbd3801 100644
--- a/src/libs/extensionsystem/CMakeLists.txt
+++ b/src/libs/extensionsystem/CMakeLists.txt
@@ -12,7 +12,8 @@ add_qtc_library(ExtensionSystem
     pluginmanager.cpp pluginmanager.h pluginmanager_p.h
     pluginspec.cpp pluginspec.h pluginspec_p.h
     pluginview.cpp pluginview.h
-    EXPLICIT_MOC
-      pluginmanager.h
-      pluginmanager_p.h
+  EXPLICIT_MOC
+    pluginmanager.h
+    pluginmanager_p.h
+  SKIP_AUTOMOC pluginmanager.cpp
 )