diff --git a/dtool/src/parser-inc/Sources.pp b/dtool/src/parser-inc/Sources.pp
index 5ba630a05c..1a6884049c 100644
--- a/dtool/src/parser-inc/Sources.pp
+++ b/dtool/src/parser-inc/Sources.pp
@@ -10,4 +10,4 @@
     cv.h cvtypes.h cxcore.h cxerror.h cxtypes.h highgui.h \
     avcodec.h avformat.h avio.h avutil.h common.h integer.h \
     intfloat_readwrite.h mathematics.h rational.h rtp.h \
-    rtsp.h rtspcodes.h
+    rtsp.h rtspcodes.h winsock2.h