diff --git a/panda/src/express/express_composite2.cxx b/panda/src/express/express_composite2.cxx
index 5344b7b851..31eb84d2b5 100644
--- a/panda/src/express/express_composite2.cxx
+++ b/panda/src/express/express_composite2.cxx
@@ -1,3 +1,4 @@
+#include "pta_int.cxx"
 #include "pta_uchar.cxx"
 #include "pta_float.cxx"
 #include "ramfile.cxx"