diff --git a/libs/fluidsynth/config.h b/libs/fluidsynth/config.h
index 7097bc19c1..2e2412ef08 100644
--- a/libs/fluidsynth/config.h
+++ b/libs/fluidsynth/config.h
@@ -216,6 +216,10 @@
 #define SUPPORTS_VLA 1 
 #endif
 
+#ifdef _MSC_VER
+#define HAVE_IO_H
+#endif
+
 /* Define to 1 if your processor stores words with the most significant byte
    first (like Motorola and SPARC, unlike Intel and VAX). */
 /* #undef WORDS_BIGENDIAN */
diff --git a/libs/fluidsynth/src/fluid_sys.c b/libs/fluidsynth/src/fluid_sys.c
index 55decaa506..328f2556d6 100644
--- a/libs/fluidsynth/src/fluid_sys.c
+++ b/libs/fluidsynth/src/fluid_sys.c
@@ -19,7 +19,6 @@
  */
 
 #include "fluid_sys.h"
-#include <io.h>
 
 
 #if WITH_READLINE