diff --git a/dlls/msvcr100/msvcr100.c b/dlls/msvcr100/msvcr100.c
index d4254552872..28d4d6ed8be 100644
--- a/dlls/msvcr100/msvcr100.c
+++ b/dlls/msvcr100/msvcr100.c
@@ -25,6 +25,7 @@
 #include "stdlib.h"
 #include "errno.h"
 #include "malloc.h"
+#include "mbstring.h"
 #include "limits.h"
 #include "sys/stat.h"
 #include "windef.h"
@@ -489,6 +490,11 @@ int CDECL MSVCR100_atoi(const char *str)
     return _atoi_l(str, NULL);
 }
 
+unsigned char* CDECL MSVCR100__mbstok(unsigned char *str, const unsigned char *delim)
+{
+    return _mbstok_l(str, delim, NULL);
+}
+
 /*********************************************************************
  *  DllMain (MSVCR100.@)
  */
diff --git a/dlls/msvcr100/msvcr100.spec b/dlls/msvcr100/msvcr100.spec
index 63a0caac3f8..8e728c17d84 100644
--- a/dlls/msvcr100/msvcr100.spec
+++ b/dlls/msvcr100/msvcr100.spec
@@ -1182,7 +1182,7 @@
 @ stub _mbsspnp_l
 @ cdecl _mbsstr(str str) msvcrt._mbsstr
 @ stub _mbsstr_l
-@ cdecl _mbstok(str str) msvcrt._mbstok
+@ cdecl _mbstok(str str) MSVCR100__mbstok
 @ cdecl _mbstok_l(str str ptr) msvcrt._mbstok_l
 @ cdecl _mbstok_s(str str ptr) msvcrt._mbstok_s
 @ cdecl _mbstok_s_l(str str ptr ptr) msvcrt._mbstok_s_l
diff --git a/dlls/msvcr110/msvcr110.spec b/dlls/msvcr110/msvcr110.spec
index e82f100c567..7b43159d03e 100644
--- a/dlls/msvcr110/msvcr110.spec
+++ b/dlls/msvcr110/msvcr110.spec
@@ -1544,7 +1544,7 @@
 @ stub _mbsspnp_l
 @ cdecl _mbsstr(str str) msvcrt._mbsstr
 @ stub _mbsstr_l
-@ cdecl _mbstok(str str) msvcrt._mbstok
+@ cdecl _mbstok(str str) msvcr100._mbstok #don't forward to msvcrt
 @ cdecl _mbstok_l(str str ptr) msvcrt._mbstok_l
 @ cdecl _mbstok_s(str str ptr) msvcrt._mbstok_s
 @ cdecl _mbstok_s_l(str str ptr ptr) msvcrt._mbstok_s_l
diff --git a/dlls/msvcr70/msvcr70.spec b/dlls/msvcr70/msvcr70.spec
index 1a33fbb08a6..dc6dc039fdd 100644
--- a/dlls/msvcr70/msvcr70.spec
+++ b/dlls/msvcr70/msvcr70.spec
@@ -468,7 +468,7 @@
 @ cdecl _mbsspn(str str) msvcrt._mbsspn
 @ cdecl _mbsspnp(str str) msvcrt._mbsspnp
 @ cdecl _mbsstr(str str) msvcrt._mbsstr
-@ cdecl _mbstok(str str) msvcrt._mbstok
+@ cdecl _mbstok(str str) msvcr100._mbstok #don't forward to msvcrt
 @ cdecl _mbstrlen(str) msvcrt._mbstrlen
 @ cdecl _mbsupr(str) msvcrt._mbsupr
 @ cdecl _memccpy(ptr ptr long long) msvcrt._memccpy
diff --git a/dlls/msvcr71/msvcr71.spec b/dlls/msvcr71/msvcr71.spec
index afdab05e1dd..3e3cf6f04f0 100644
--- a/dlls/msvcr71/msvcr71.spec
+++ b/dlls/msvcr71/msvcr71.spec
@@ -463,7 +463,7 @@
 @ cdecl _mbsspn(str str) msvcrt._mbsspn
 @ cdecl _mbsspnp(str str) msvcrt._mbsspnp
 @ cdecl _mbsstr(str str) msvcrt._mbsstr
-@ cdecl _mbstok(str str) msvcrt._mbstok
+@ cdecl _mbstok(str str) msvcr100._mbstok #don't forward to msvcrt
 @ cdecl _mbstrlen(str) msvcrt._mbstrlen
 @ cdecl _mbsupr(str) msvcrt._mbsupr
 @ cdecl _memccpy(ptr ptr long long) msvcrt._memccpy
diff --git a/dlls/msvcr80/msvcr80.spec b/dlls/msvcr80/msvcr80.spec
index 521a69d0db2..2344f0fcccb 100644
--- a/dlls/msvcr80/msvcr80.spec
+++ b/dlls/msvcr80/msvcr80.spec
@@ -853,7 +853,7 @@
 @ stub _mbsspnp_l
 @ cdecl _mbsstr(str str) msvcrt._mbsstr
 @ stub _mbsstr_l
-@ cdecl _mbstok(str str) msvcrt._mbstok
+@ cdecl _mbstok(str str) msvcr100._mbstok #don't forward to msvcrt
 @ cdecl _mbstok_l(str str ptr) msvcrt._mbstok_l
 @ cdecl _mbstok_s(str str ptr) msvcrt._mbstok_s
 @ cdecl _mbstok_s_l(str str ptr ptr) msvcrt._mbstok_s_l
diff --git a/dlls/msvcr90/msvcr90.spec b/dlls/msvcr90/msvcr90.spec
index fd71ef4c576..e31da911feb 100644
--- a/dlls/msvcr90/msvcr90.spec
+++ b/dlls/msvcr90/msvcr90.spec
@@ -831,7 +831,7 @@
 @ stub _mbsspnp_l
 @ cdecl _mbsstr(str str) msvcrt._mbsstr
 @ stub _mbsstr_l
-@ cdecl _mbstok(str str) msvcrt._mbstok
+@ cdecl _mbstok(str str) msvcr100._mbstok #don't forward to msvcrt
 @ cdecl _mbstok_l(str str ptr) msvcrt._mbstok_l
 @ cdecl _mbstok_s(str str ptr) msvcrt._mbstok_s
 @ cdecl _mbstok_s_l(str str ptr ptr) msvcrt._mbstok_s_l
diff --git a/dlls/msvcrt/mbcs.c b/dlls/msvcrt/mbcs.c
index b70ffa01084..b25649b6638 100644
--- a/dlls/msvcrt/mbcs.c
+++ b/dlls/msvcrt/mbcs.c
@@ -1149,7 +1149,12 @@ unsigned char* CDECL _mbstok_l(unsigned char *str,
  */
 unsigned char* CDECL _mbstok(unsigned char *str, const unsigned char *delim)
 {
-    return _mbstok_s_l(str, delim, &msvcrt_get_thread_data()->mbstok_next, NULL);
+    thread_data_t *data = msvcrt_get_thread_data();
+
+    if(!str && !data->mbstok_next)
+        return NULL;
+
+    return _mbstok_s_l(str, delim, &data->mbstok_next, NULL);
 }
 
 /*********************************************************************
diff --git a/include/msvcrt/mbstring.h b/include/msvcrt/mbstring.h
index a4d0746bcaf..7a40f7b4cb7 100644
--- a/include/msvcrt/mbstring.h
+++ b/include/msvcrt/mbstring.h
@@ -102,6 +102,7 @@ size_t         __cdecl _mbsspn(const unsigned char*,const unsigned char*);
 unsigned char* __cdecl _mbsspnp(const unsigned char*,const unsigned char*);
 unsigned char* __cdecl _mbsstr(const unsigned char*,const unsigned char*);
 unsigned char* __cdecl _mbstok(unsigned char*,const unsigned char*);
+unsigned char* __cdecl _mbstok_l(unsigned char*,const unsigned char*,_locale_t);
 unsigned char* __cdecl _mbsupr(unsigned char*);
 
 #ifndef _MBLEADTRAIL_DEFINED