diff --git a/mkxp.pro b/mkxp.pro
index 2c082fc..e50d5ab 100644
--- a/mkxp.pro
+++ b/mkxp.pro
@@ -217,10 +217,12 @@ RGSS2 {
 }
 
 MIDI {
-	SOURCES += \
-	src/midisource.cpp \
+	HEADERS += \
 	src/sharedmidistate.h
 
+	SOURCES += \
+	src/midisource.cpp
+
 	DEFINES += MIDI
 }