diff --git a/src/designer/src/components/lib/lib_pch.h b/src/designer/src/components/lib/lib_pch.h
index f2f226797934c1aa39d1956bb054ae7f29766491..d03a498c21a321117b81b22a00cb6dbfd9552b5b 100644
--- a/src/designer/src/components/lib/lib_pch.h
+++ b/src/designer/src/components/lib/lib_pch.h
@@ -26,5 +26,7 @@
 **
 ****************************************************************************/
 
+#if defined __cplusplus
 #include <QtDesigner/QtDesigner>
 #include <QtDesigner/QExtensionManager>
+#endif