diff --git a/src/i_winmusic.c b/src/i_winmusic.c
index b8421bab..7890a7c7 100644
--- a/src/i_winmusic.c
+++ b/src/i_winmusic.c
@@ -823,7 +823,7 @@ static boolean AddToBuffer(unsigned int delta_time, const midi_event_t *event,
 
     if (use_fallback)
     {
-        MIDI_CheckFallback(event, &fallback);
+        MIDI_CheckFallback(event, &fallback, true);
     }
 
     switch ((int)event->event_type)
diff --git a/src/midifallback.c b/src/midifallback.c
index a9b4bf75..6f2d1ffd 100644
--- a/src/midifallback.c
+++ b/src/midifallback.c
@@ -144,7 +144,8 @@ static boolean GetProgramFallback(byte idx, byte program,
     return false;
 }
 
-void MIDI_CheckFallback(const midi_event_t *event, midi_fallback_t *fallback)
+void MIDI_CheckFallback(const midi_event_t *event, midi_fallback_t *fallback,
+                        boolean allow_sysex)
 {
     byte idx;
     byte program;
@@ -152,7 +153,10 @@ void MIDI_CheckFallback(const midi_event_t *event, midi_fallback_t *fallback)
     switch ((int)event->event_type)
     {
         case MIDI_EVENT_SYSEX:
-            UpdateDrumMap(event->data.sysex.data, event->data.sysex.length);
+            if (allow_sysex)
+            {
+                UpdateDrumMap(event->data.sysex.data, event->data.sysex.length);
+            }
             break;
 
         case MIDI_EVENT_CONTROLLER:
diff --git a/src/midifallback.h b/src/midifallback.h
index 840311a1..dd96ff74 100644
--- a/src/midifallback.h
+++ b/src/midifallback.h
@@ -35,7 +35,8 @@ typedef struct midi_fallback_t
     byte value;
 } midi_fallback_t;
 
-void MIDI_CheckFallback(const midi_event_t *event, midi_fallback_t *fallback);
+void MIDI_CheckFallback(const midi_event_t *event, midi_fallback_t *fallback,
+                        boolean allow_sysex);
 void MIDI_ResetFallback(void);
 void MIDI_InitFallback(void);