diff --git a/FM/Engine.h b/src/FM/Engine.h
similarity index 100%
rename from FM/Engine.h
rename to src/FM/Engine.h
diff --git a/FM/Envelope.cpp b/src/FM/Envelope.cpp
similarity index 100%
rename from FM/Envelope.cpp
rename to src/FM/Envelope.cpp
diff --git a/FM/Envelope.h b/src/FM/Envelope.h
similarity index 100%
rename from FM/Envelope.h
rename to src/FM/Envelope.h
diff --git a/FM/Matrix.h b/src/FM/Matrix.h
similarity index 100%
rename from FM/Matrix.h
rename to src/FM/Matrix.h
diff --git a/FM/Operator.cpp b/src/FM/Operator.cpp
similarity index 100%
rename from FM/Operator.cpp
rename to src/FM/Operator.cpp
diff --git a/FM/Operator.h b/src/FM/Operator.h
similarity index 100%
rename from FM/Operator.h
rename to src/FM/Operator.h
diff --git a/FM/fmtest.cpp b/src/fmtest.cpp
similarity index 99%
rename from FM/fmtest.cpp
rename to src/fmtest.cpp
index 93a6fc8..cd2ac7b 100644
--- a/FM/fmtest.cpp
+++ b/src/fmtest.cpp
@@ -11,7 +11,7 @@
  *
  */
 
-#include "Engine.h"
+#include "FM/Engine.h"
 #include <stdio.h>
 #include <stdlib.h>
 #include <math.h>