diff --git a/goldlib/gall/gctype.h b/goldlib/gall/gctype.h
index 829db11..b909dd0 100644
--- a/goldlib/gall/gctype.h
+++ b/goldlib/gall/gctype.h
@@ -43,17 +43,25 @@
 #include <ctype.h>
 #if defined(__EMX__)
 #include <sys/nls.h>
-__inline__ int tolower(int a) { return _nls_tolower((unsigned char)(a)); }
-__inline__ int toupper(int a) { return _nls_toupper((unsigned char)(a)); }
-#elif defined(__WIN32__)
 #ifdef __cplusplus
 extern "C" {
 #endif
+__inline__ int tolower(int a) { return _nls_tolower((unsigned char)(a)); }
+__inline__ int toupper(int a) { return _nls_toupper((unsigned char)(a)); }
+#ifdef __cplusplus
+}
+#endif
+#elif defined(__WIN32__)
+#ifdef __cplusplus
+extern "C" {
 extern char tl[256], tu[256];
 __inline__ int tolower(int c) { return tl[c]; }
 __inline__ int toupper(int c) { return tu[c]; }
-#ifdef __cplusplus
 }
+#else
+extern char tl[256], tu[256];
+#define tolower(c) tl[(int)(unsigned char)c]
+#define toupper(c) tu[(int)(unsigned char)c]
 #endif
 #endif
 
diff --git a/goldlib/gall/gutlwin.cpp b/goldlib/gall/gutlwin.cpp
index 81029a9..53ffaea 100644
--- a/goldlib/gall/gutlwin.cpp
+++ b/goldlib/gall/gutlwin.cpp
@@ -28,10 +28,11 @@
 
 #include <clocale>
 #include <cstdio>
+#include <cctype>
+#define __gctype_h // prevent gctype from being included
 #include <gstrall.h>
 #include <gmemdbg.h>
 #include <gutlos.h>
-#include <gctype.h>
 #include <windows.h>
 #ifndef __NO_MMSYSTEM
 #include <mmsystem.h>
@@ -143,8 +144,8 @@ int g_init_os(int flags) {
     setlocale(LC_CTYPE, locale);
 #endif
     for(i = 0; i < 256; i++) {
-      tu[i] = (toupper)(i);
-      tl[i] = (tolower)(i);
+      tu[i] = toupper(i);
+      tl[i] = tolower(i);
       CHAR chr = (CHAR)i;
       MultiByteToWideChar(CP_OEMCP, MB_USEGLYPHCHARS, &chr, 1, oem2unicode+i, 1);
     }
@@ -158,8 +159,8 @@ int g_init_os(int flags) {
   // tolower/toupper tables
   char src[2], dst[2], tst[2];
   for(i = 0; i < 32; i++) {
-    tu[i] = (toupper)(i);
-    tl[i] = (tolower)(i);
+    tu[i] = toupper(i);
+    tl[i] = tolower(i);
   }
   for(i = 32; i < 256; i++) {
     tu[i] = tl[i] = i;