diff --git a/Source/i_oplmusic.c b/Source/i_oplmusic.c
index afba75dc..a09a113a 100644
--- a/Source/i_oplmusic.c
+++ b/Source/i_oplmusic.c
@@ -1657,6 +1657,7 @@ static void *I_OPL_RegisterSong(void *data, int len)
         {
             MIDIToMidi(&mididata, &mid, &midlen);
             result = MIDI_LoadFile(mid, midlen);
+            free(mid);
         }
         else
         {