diff --git a/qrenderdoc/qrenderdoc.pro b/qrenderdoc/qrenderdoc.pro
index 6a337f96b..9996e0781 100644
--- a/qrenderdoc/qrenderdoc.pro
+++ b/qrenderdoc/qrenderdoc.pro
@@ -32,6 +32,9 @@ INCLUDEPATH += $$_PRO_FILE_PWD_/3rdparty/scintilla/include
 # Disable conversions to/from const char * in QString
 DEFINES += QT_NO_CAST_FROM_ASCII QT_NO_CAST_TO_ASCII
 
+# Only count deprecated things from before 5.9, since that's our min spec
+DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x050900
+
 # Different output folders per platform
 win32 {