diff --git a/dtool/Sources.pp b/dtool/Sources.pp
index 6146f3e2ac..5c2ed1db94 100644
--- a/dtool/Sources.pp
+++ b/dtool/Sources.pp
@@ -7,5 +7,5 @@
 #define SAMPLE_SOURCE_FILE src/dtoolbase/dtoolbase.cxx
 
 #define EXTRA_DIST \
-    Config.Irix.pp Config.Linux.pp Config.Win32.pp Config.Cygwin.pp \
+    Config.Irix.pp Config.Linux.pp Config.osx.pp Config.Win32.pp Config.Cygwin.pp \
     LocalSetup.pp Package.pp