diff --git a/src/tools/rcc/rcc.cpp b/src/tools/rcc/rcc.cpp
index 8a9afec690..740ae91b68 100644
--- a/src/tools/rcc/rcc.cpp
+++ b/src/tools/rcc/rcc.cpp
@@ -52,6 +52,8 @@
 #include <QtCore/QStack>
 #include <QtCore/QXmlStreamReader>
 
+// Note: A copy of this file is used in Qt Designer (qttools/src/designer/src/lib/shared/rcc.cpp)
+
 QT_BEGIN_NAMESPACE
 
 enum {
diff --git a/src/tools/rcc/rcc.h b/src/tools/rcc/rcc.h
index 6fe8059551..a808f576c5 100644
--- a/src/tools/rcc/rcc.h
+++ b/src/tools/rcc/rcc.h
@@ -39,6 +39,8 @@
 **
 ****************************************************************************/
 
+// Note: A copy of this file is used in Qt Designer (qttools/src/designer/src/lib/shared/rcc_p.h)
+
 #ifndef RCC_H
 #define RCC_H