diff --git a/panda/src/movies/Sources.pp b/panda/src/movies/Sources.pp
index 2418177af3..dfeb57d45e 100644
--- a/panda/src/movies/Sources.pp
+++ b/panda/src/movies/Sources.pp
@@ -2,6 +2,7 @@
                    dtoolutil:c dtoolbase:c dtool:m prc:c
 
 #define USE_PACKAGES ffmpeg dx9
+#define WIN_SYS_LIBS strmiids.lib
 
 #begin lib_target
   #define TARGET movies