1 files changed, 7 insertions, 0 deletions
diff --git a/src/i_sound.h b/src/i_sound.h
index e429e960..a240c48b 100644
--- a/src/i_sound.h
+++ b/src/i_sound.h
@@ -234,5 +234,12 @@ extern char *snd_musiccmd;
 
 void I_BindSoundVariables(void);
 
+typedef enum {
+    opl_v_old, // hexen heretic
+    opl_v_new // doom strife
+} opl_driver_ver_t;
+
+void I_SetOPLDriverVer(opl_driver_ver_t ver);
+
 #endif