diff --git a/src/libespeak-ng/mbrowrap.h b/src/libespeak-ng/mbrowrap.h
index b319e945..d492f5a6 100644
--- a/src/libespeak-ng/mbrowrap.h
+++ b/src/libespeak-ng/mbrowrap.h
@@ -3,6 +3,7 @@
  * providing a subset of the API from the Windows mbrola DLL.
  *
  * Copyright (C) 2010 by Nicolas Pitre <nico@fluxnic.net>
+ * Copyright (C) 2016 Reece H. Dunn
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -23,6 +24,33 @@ extern "C"
 {
 #endif
 
+#if defined(_WIN32) || defined(_WIN64)
+
+typedef void (WINAPI *PROCVV)(void);
+typedef void (WINAPI *PROCVI)(int);
+typedef void (WINAPI *PROCVF)(float);
+typedef int (WINAPI *PROCIV)();
+typedef int (WINAPI *PROCIC)(char *);
+typedef int (WINAPI *PROCISI)(short *, int);
+typedef char * (WINAPI *PROCVCI)(char *, int);
+
+PROCIC init_MBR;
+PROCIC write_MBR;
+PROCIV flush_MBR;
+PROCISI read_MBR;
+PROCVV close_MBR;
+PROCVV reset_MBR;
+PROCIV lastError_MBR;
+PROCVCI lastErrorStr_MBR;
+PROCVI setNoError_MBR;
+PROCIV getFreq_MBR;
+PROCVF setVolumeRatio_MBR;
+
+BOOL load_MBR();
+void unload_MBR();
+
+#else
+
 /*
  * Initialize mbrola.  The 'voice_path' argument must contain the
  * path and file name to the mbrola voice database to be used. Returned
@@ -104,6 +132,8 @@ static inline void setNoError_MBR(int no_error)
 	(void)no_error; // unused
 }
 
+#endif
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/src/libespeak-ng/synth_mbrola.c b/src/libespeak-ng/synth_mbrola.c
index 9ff54055..48f65255 100644
--- a/src/libespeak-ng/synth_mbrola.c
+++ b/src/libespeak-ng/synth_mbrola.c
@@ -48,26 +48,9 @@ extern unsigned char *outbuf;
 #include "mbrowrap.h"
 
 #else
-#include <windows.h>
-typedef void (WINAPI *PROCVV)(void);
-typedef void (WINAPI *PROCVI)(int);
-typedef void (WINAPI *PROCVF)(float);
-typedef int (WINAPI *PROCIV)();
-typedef int (WINAPI *PROCIC)(char *);
-typedef int (WINAPI *PROCISI)(short *, int);
-typedef char * (WINAPI *PROCVCI)(char *, int);
 
-PROCIC init_MBR;
-PROCIC write_MBR;
-PROCIV flush_MBR;
-PROCISI read_MBR;
-PROCVV close_MBR;
-PROCVV reset_MBR;
-PROCIV lastError_MBR;
-PROCVCI lastErrorStr_MBR;
-PROCVI setNoError_MBR;
-PROCIV getFreq_MBR;
-PROCVF setVolumeRatio_MBR;
+#include <windows.h>
+#include "mbrowrap.h"
 
 HINSTANCE hinstDllMBR = NULL;
 
diff --git a/src/windows/libespeak-ng.vcxproj b/src/windows/libespeak-ng.vcxproj
index e243d9f1..4f20041e 100644
--- a/src/windows/libespeak-ng.vcxproj
+++ b/src/windows/libespeak-ng.vcxproj
@@ -178,6 +178,7 @@
     <ClInclude Include="..\include\espeak\speak_lib.h" />
     <ClInclude Include="..\libespeak-ng\error.h" />
     <ClInclude Include="..\libespeak-ng\klatt.h" />
+    <ClInclude Include="..\libespeak-ng\mbrowrap.h" />
     <ClInclude Include="..\libespeak-ng\phoneme.h" />
     <ClInclude Include="..\libespeak-ng\sintab.h" />
     <ClInclude Include="..\libespeak-ng\spect.h" />
diff --git a/src/windows/libespeak-ng.vcxproj.filters b/src/windows/libespeak-ng.vcxproj.filters
index 994fb6e4..0527363c 100644
--- a/src/windows/libespeak-ng.vcxproj.filters
+++ b/src/windows/libespeak-ng.vcxproj.filters
@@ -122,5 +122,8 @@
     <ClInclude Include="..\libespeak-ng\klatt.h">
       <Filter>Header Files</Filter>
     </ClInclude>
+    <ClInclude Include="..\libespeak-ng\mbrowrap.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
   </ItemGroup>
 </Project>
\ No newline at end of file