diff --git a/dlls/msvcr100/msvcr100.spec b/dlls/msvcr100/msvcr100.spec
index eefa57348d6..aa817bfba32 100644
--- a/dlls/msvcr100/msvcr100.spec
+++ b/dlls/msvcr100/msvcr100.spec
@@ -990,7 +990,7 @@
 @ cdecl _ismbcl0_l(long ptr)
 @ cdecl _ismbcl1(long)
 @ cdecl _ismbcl1_l(long ptr)
-@ stub _ismbcl2(long)
+@ cdecl _ismbcl2(long)
 @ cdecl _ismbcl2_l(long ptr)
 @ cdecl _ismbclegal(long)
 @ cdecl _ismbclegal_l(long ptr)
diff --git a/dlls/msvcr110/msvcr110.spec b/dlls/msvcr110/msvcr110.spec
index a6ed5c12351..1b85830642d 100644
--- a/dlls/msvcr110/msvcr110.spec
+++ b/dlls/msvcr110/msvcr110.spec
@@ -1336,7 +1336,7 @@
 @ cdecl _ismbcl0_l(long ptr)
 @ cdecl _ismbcl1(long)
 @ cdecl _ismbcl1_l(long ptr)
-@ stub _ismbcl2(long)
+@ cdecl _ismbcl2(long)
 @ cdecl _ismbcl2_l(long ptr)
 @ cdecl _ismbclegal(long)
 @ cdecl _ismbclegal_l(long ptr)
diff --git a/dlls/msvcr120/msvcr120.spec b/dlls/msvcr120/msvcr120.spec
index 441c0bee86a..769ee50790b 100644
--- a/dlls/msvcr120/msvcr120.spec
+++ b/dlls/msvcr120/msvcr120.spec
@@ -1341,7 +1341,7 @@
 @ cdecl _ismbcl0_l(long ptr)
 @ cdecl _ismbcl1(long)
 @ cdecl _ismbcl1_l(long ptr)
-@ stub _ismbcl2(long)
+@ cdecl _ismbcl2(long)
 @ cdecl _ismbcl2_l(long ptr)
 @ cdecl _ismbclegal(long)
 @ cdecl _ismbclegal_l(long ptr)
diff --git a/dlls/msvcr70/msvcr70.spec b/dlls/msvcr70/msvcr70.spec
index 629dce95d8f..1a68a65f721 100644
--- a/dlls/msvcr70/msvcr70.spec
+++ b/dlls/msvcr70/msvcr70.spec
@@ -383,7 +383,7 @@
 @ cdecl _ismbckata(long)
 @ cdecl _ismbcl0(long)
 @ cdecl _ismbcl1(long)
-@ stub _ismbcl2(long)
+@ cdecl _ismbcl2(long)
 @ cdecl _ismbclegal(long)
 @ cdecl _ismbclower(long)
 @ cdecl _ismbcprint(long)
diff --git a/dlls/msvcr71/msvcr71.spec b/dlls/msvcr71/msvcr71.spec
index f0009beb6c0..f4c0e6d0fa0 100644
--- a/dlls/msvcr71/msvcr71.spec
+++ b/dlls/msvcr71/msvcr71.spec
@@ -378,7 +378,7 @@
 @ cdecl _ismbckata(long)
 @ cdecl _ismbcl0(long)
 @ cdecl _ismbcl1(long)
-@ stub _ismbcl2(long)
+@ cdecl _ismbcl2(long)
 @ cdecl _ismbclegal(long)
 @ cdecl _ismbclower(long)
 @ cdecl _ismbcprint(long)
diff --git a/dlls/msvcr80/msvcr80.spec b/dlls/msvcr80/msvcr80.spec
index 43c3e463257..8295a712906 100644
--- a/dlls/msvcr80/msvcr80.spec
+++ b/dlls/msvcr80/msvcr80.spec
@@ -662,7 +662,7 @@
 @ cdecl _ismbcl0_l(long ptr)
 @ cdecl _ismbcl1(long)
 @ cdecl _ismbcl1_l(long ptr)
-@ stub _ismbcl2(long)
+@ cdecl _ismbcl2(long)
 @ cdecl _ismbcl2_l(long ptr)
 @ cdecl _ismbclegal(long)
 @ cdecl _ismbclegal_l(long ptr)
diff --git a/dlls/msvcr90/msvcr90.spec b/dlls/msvcr90/msvcr90.spec
index a9bf0a27024..9e9777053ea 100644
--- a/dlls/msvcr90/msvcr90.spec
+++ b/dlls/msvcr90/msvcr90.spec
@@ -640,7 +640,7 @@
 @ cdecl _ismbcl0_l(long ptr)
 @ cdecl _ismbcl1(long)
 @ cdecl _ismbcl1_l(long ptr)
-@ stub _ismbcl2(long)
+@ cdecl _ismbcl2(long)
 @ cdecl _ismbcl2_l(long ptr)
 @ cdecl _ismbclegal(long)
 @ cdecl _ismbclegal_l(long ptr)
diff --git a/dlls/msvcrt/mbcs.c b/dlls/msvcrt/mbcs.c
index ca6dca381f1..9b22adca1c5 100644
--- a/dlls/msvcrt/mbcs.c
+++ b/dlls/msvcrt/mbcs.c
@@ -2629,3 +2629,11 @@ int CDECL _ismbcl2_l(unsigned int c, MSVCRT__locale_t locale)
 
     return 0;
 }
+
+/*********************************************************************
+ *		_ismbcl2 (MSVCRT.@)
+ */
+int CDECL _ismbcl2(unsigned int c)
+{
+    return _ismbcl2_l(c, NULL);
+}
diff --git a/dlls/msvcrt/msvcrt.spec b/dlls/msvcrt/msvcrt.spec
index 42de9ced962..c2c272b6376 100644
--- a/dlls/msvcrt/msvcrt.spec
+++ b/dlls/msvcrt/msvcrt.spec
@@ -611,7 +611,7 @@
 @ cdecl _ismbcl0_l(long ptr)
 @ cdecl _ismbcl1(long)
 @ cdecl _ismbcl1_l(long ptr)
-@ stub _ismbcl2(long)
+@ cdecl _ismbcl2(long)
 @ cdecl _ismbcl2_l(long ptr)
 @ cdecl _ismbclegal(long)
 @ cdecl _ismbclegal_l(long ptr)
diff --git a/dlls/msvcrt/tests/string.c b/dlls/msvcrt/tests/string.c
index 53fbfd334b9..eb8e3041073 100644
--- a/dlls/msvcrt/tests/string.c
+++ b/dlls/msvcrt/tests/string.c
@@ -3278,6 +3278,9 @@ static void test__ismbclx(void)
     ret = _ismbcl1(0);
     ok(!ret, "got %d\n", ret);
 
+    ret = _ismbcl2(0);
+    ok(!ret, "got %d\n", ret);
+
     cp = _setmbcp(1252);
 
     ret = _ismbcl0(0x8140);
@@ -3286,6 +3289,9 @@ static void test__ismbclx(void)
     ret = _ismbcl1(0x889f);
     ok(!ret, "got %d\n", ret);
 
+    ret = _ismbcl2(0x989f);
+    ok(!ret, "got %d\n", ret);
+
     _setmbcp(932);
 
     ret = _ismbcl0(0);
@@ -3306,6 +3312,15 @@ static void test__ismbclx(void)
     ret = _ismbcl1(0x88fd);
     ok(!ret, "got %d\n", ret);
 
+    ret = _ismbcl2(0);
+    ok(!ret, "got %d\n", ret);
+
+    ret = _ismbcl2(0x989f);
+    ok(ret, "got %d\n", ret);
+
+    ret = _ismbcl2(0x993f);
+    ok(!ret, "got %d\n", ret);
+
     _setmbcp(cp);
 }
 
diff --git a/dlls/ucrtbase/ucrtbase.spec b/dlls/ucrtbase/ucrtbase.spec
index e1315ec1cef..eb08843d160 100644
--- a/dlls/ucrtbase/ucrtbase.spec
+++ b/dlls/ucrtbase/ucrtbase.spec
@@ -480,7 +480,7 @@
 @ cdecl _ismbcl0_l(long ptr)
 @ cdecl _ismbcl1(long)
 @ cdecl _ismbcl1_l(long ptr)
-@ stub _ismbcl2(long)
+@ cdecl _ismbcl2(long)
 @ cdecl _ismbcl2_l(long ptr)
 @ cdecl _ismbclegal(long)
 @ cdecl _ismbclegal_l(long ptr)