diff --git a/src/s_sound.c b/src/s_sound.c
index d98f506b8..c4d1993bf 100644
--- a/src/s_sound.c
+++ b/src/s_sound.c
@@ -2041,6 +2041,11 @@ ReadMusicDefFields
 				textline[0] = toupper(textline[0]);
 				def->important = (textline[0] == 'Y' || textline[0] == 'T' || textline[0] == '1');
 			}
+			else if (!stricmp(stoken, "contentidunsafe"))
+			{
+				textline[0] = toupper(textline[0]);
+				def->contentidunsafe = (textline[0] == 'Y' || textline[0] == 'T' || textline[0] == '1');
+			}
 			else
 			{
 				MusicDefError(CONS_WARNING,
diff --git a/src/s_sound.h b/src/s_sound.h
index d76deb441..3b780300e 100644
--- a/src/s_sound.h
+++ b/src/s_sound.h
@@ -171,6 +171,7 @@ struct musicdef_t
 	int volume;
 	int debug_volume;
 	boolean important;
+	boolean contentidunsafe;
 	musicdef_t *next;
 	soundtestsequence_t sequence;
 };