diff --git a/src/m4a.c b/src/m4a.c
index 3bb440f656..717cafc78e 100644
--- a/src/m4a.c
+++ b/src/m4a.c
@@ -1703,14 +1703,14 @@ void SetPokemonCryProgress(u32 val)
     gPokemonCrySong.unkCmd0DParam = val;
 }
 
-int IsPokemonCryPlaying(struct MusicPlayerInfo *mplayInfo)
+bool32 IsPokemonCryPlaying(struct MusicPlayerInfo *mplayInfo)
 {
     struct MusicPlayerTrack *track = mplayInfo->tracks;
 
     if (track->chan && track->chan->track == track)
-        return 1;
+        return TRUE;
     else
-        return 0;
+        return FALSE;
 }
 
 void SetPokemonCryChorus(s8 val)