diff --git a/panda/src/pnmimagetypes/pnmimagetypes_composite2.cxx b/panda/src/pnmimagetypes/pnmimagetypes_composite2.cxx
index 15b15e7508..fdae30cad3 100644
--- a/panda/src/pnmimagetypes/pnmimagetypes_composite2.cxx
+++ b/panda/src/pnmimagetypes/pnmimagetypes_composite2.cxx
@@ -1,4 +1,5 @@
 #include "pnmFileTypePNG.cxx"
+#include "pnmFileTypeTIFF.cxx"
 #include "pnmFileTypePNM.cxx"
 #include "pnmFileTypeSGI.cxx"
 #include "pnmFileTypeSGIReader.cxx"