diff --git a/panda/src/grutil/Sources.pp b/panda/src/grutil/Sources.pp
index c8b14c06d9..938ea6bb6c 100644
--- a/panda/src/grutil/Sources.pp
+++ b/panda/src/grutil/Sources.pp
@@ -6,7 +6,7 @@
 #begin lib_target
   #define TARGET grutil
   #define LOCAL_LIBS \
-    display text pgraph gobj linmath putil movies
+    display text pgraph gobj linmath putil movies audio
     
   #define COMBINED_SOURCES $[TARGET]_composite1.cxx