diff --git a/src/formats.c b/src/formats.c
index c2fa8e36..3838aafd 100644
--- a/src/formats.c
+++ b/src/formats.c
@@ -630,6 +630,7 @@ static const char* extension_list[] = {
     "wavebatch",
     "wavm",
     "wavx", //txth/reserved [LEGO Star Wars (Xbox)]
+    "wax",
     "way",
     "wb",
     "wb2",
diff --git a/src/meta/riff.c b/src/meta/riff.c
index 0f5166f7..3a35c8d3 100644
--- a/src/meta/riff.c
+++ b/src/meta/riff.c
@@ -399,8 +399,9 @@ VGMSTREAM* init_vgmstream_riff(STREAMFILE* sf) {
      * .dat/ldat: RollerCoaster Tycoon 1/2 (PC)
      * .wma/lwma: SRS: Street Racing Syndicate (Xbox), Fast and the Furious (Xbox)
      * .caf: Topple (iOS)
+     * .wax: Lamborghini (Xbox)
      */
-    if (!check_extensions(sf, "wav,lwav,xwav,mwv,da,dax,cd,med,snd,adx,adp,xss,xsew,adpcm,adw,wd,,sbv,wvx,str,at3,rws,aud,at9,ckd,saf,ima,nsa,pcm,xvag,ogg,logg,p1d,xms,mus,dat,ldat,wma,lwma,caf")) {
+    if (!check_extensions(sf, "wav,lwav,xwav,mwv,da,dax,cd,med,snd,adx,adp,xss,xsew,adpcm,adw,wd,,sbv,wvx,str,at3,rws,aud,at9,ckd,saf,ima,nsa,pcm,xvag,ogg,logg,p1d,xms,mus,dat,ldat,wma,lwma,caf,wax")) {
         return NULL;
     }