diff --git a/.qmake.conf b/.qmake.conf
index dda468fa7..6a9ff9323 100644
--- a/.qmake.conf
+++ b/.qmake.conf
@@ -3,4 +3,5 @@ TINY_DOTENV_ROOT    = $$PWD
 TINYORM_SOURCE_TREE = $$PWD
 TINYORM_BUILD_TREE  = $$shadowed($$PWD)
 
+# To find .prf files, needed by eg. CONFIG += tiny_system_headers inline/extern_constants
 QMAKEFEATURES *= $$quote($$PWD/qmake/features)