diff --git a/RepositoryExternal.mk b/RepositoryExternal.mk
index 021d9a7b650e..54ab1dbfdcc3 100644
--- a/RepositoryExternal.mk
+++ b/RepositoryExternal.mk
@@ -4160,8 +4160,9 @@ ifneq ($(SYSTEM_QRCODEGEN),)
 
 define gb_LinkTarget__use_qrcodegen
 $(call gb_LinkTarget_set_include,$(1),\
-       $$(INCLUDE) \
-	   $(QRCODEGEN_CFLAGS) \
+	-DSYSTEM_QRCODEGEN \
+	$$(INCLUDE) \
+	$(QRCODEGEN_CFLAGS) \
 )
 $(call gb_LinkTarget_add_libs,$(1),$(QRCODEGEN_LIBS))
 
diff --git a/cui/source/dialogs/QrCodeGenDialog.cxx b/cui/source/dialogs/QrCodeGenDialog.cxx
index 628ada1df38b..14c9b18e9ab9 100644
--- a/cui/source/dialogs/QrCodeGenDialog.cxx
+++ b/cui/source/dialogs/QrCodeGenDialog.cxx
@@ -16,7 +16,11 @@
 #include <utility>
 #include <vcl/weld.hxx>
 
+#if defined(SYSTEM_QRCODEGEN)
+#include <qrcodegen/QrCode.hpp>
+#else
 #include <QrCode.hpp>
+#endif
 
 #include <com/sun/star/beans/XPropertySet.hpp>
 #include <com/sun/star/drawing/XDrawPageSupplier.hpp>