diff --git a/src/solver/msxcompiler.c b/src/solver/msxcompiler.c
index dbef11e..47fec40 100644
--- a/src/solver/msxcompiler.c
+++ b/src/solver/msxcompiler.c
@@ -15,6 +15,7 @@
 
 #include "msxtypes.h"
 #include "msxutils.h"
+#include "msxfuncs.h"
 
 // --- define WINDOWS