diff --git a/src/proto.h b/src/proto.h
index 4d2eded..e606f08 100644
--- a/src/proto.h
+++ b/src/proto.h
@@ -195,6 +195,7 @@
 #  include "termlib.pro"
 # endif
 # ifdef FEAT_TEXT_PROP
+#  include "popupwin.pro"
 #  include "textprop.pro"
 # endif
 # include "ui.pro"