diff --git a/audio_rules.mk b/audio_rules.mk
index 69d482fdfa..fccb9fc548 100644
--- a/audio_rules.mk
+++ b/audio_rules.mk
@@ -30,7 +30,7 @@ MID_CFG_PATH := $(MID_SUBDIR)/midi.cfg
 
 # $1: Source path no extension, $2 Options
 define MID_RULE
-$(MID_ASM_DIR)/$1.s: $(MID_SUBDIR)/$1.mid
+$(MID_ASM_DIR)/$1.s: $(MID_SUBDIR)/$1.mid $(MID_CFG_PATH)
 	$(MID) $$< $$@ $2
 endef
 #                            source path,                             remaining text (options)