diff --git a/panda/src/audiotraits/Sources.pp b/panda/src/audiotraits/Sources.pp
index 5b5930bf87..814ba38985 100644
--- a/panda/src/audiotraits/Sources.pp
+++ b/panda/src/audiotraits/Sources.pp
@@ -41,7 +41,7 @@
   #define TARGET audio_load_mp3
   #define BUILDING_DLL BUILDING_MISC
   #define LOCAL_LIBS \
-    audio express $[if $[ne $[USE_RAD_MSS],] , mpg123]
+    audio express $[if $[ne $[USE_RAD_MSS],], , mpg123]
   #define C++FLAGS -DGENERIC -DNOXFERMEM
 
   #define SOURCES \