diff --git a/src/s_sound.c b/src/s_sound.c
index 7fd71db5e..0bcab5e26 100644
--- a/src/s_sound.c
+++ b/src/s_sound.c
@@ -1979,6 +1979,7 @@ ReadMusicDefFields
 			}
 			else if (!stricmp(stoken, "important"))
 			{
+				textline[0] = toupper(textline[0]);
 				def->important = (textline[0] == 'Y' || textline[0] == 'T' || textline[0] == '1');
 			}
 			else