diff --git a/cl_dll/wscript b/cl_dll/wscript
index 847004272..7b824c9b5 100644
--- a/cl_dll/wscript
+++ b/cl_dll/wscript
@@ -99,6 +99,7 @@ def build(bld):
 
 	if bld.env.GOLDSOURCE_SUPPORT:
 		defines += ['GOLDSOURCE_SUPPORT']
+		includes += ['../external/']
 
 		if bld.env.DEST_OS == 'win32':
 			libs += ["WINMM"]