diff --git a/dlls/msvcr110/msvcr110.spec b/dlls/msvcr110/msvcr110.spec
index 3faca079659..51eddfbd422 100644
--- a/dlls/msvcr110/msvcr110.spec
+++ b/dlls/msvcr110/msvcr110.spec
@@ -533,7 +533,7 @@
 @ stub ?_Get@_CurrentScheduler@details@Concurrency@@SA?AV_Scheduler@23@XZ
 @ stub -arch=win32 ?_GetConcRTTraceInfo@Concurrency@@YAPBU_CONCRT_TRACE_INFO@details@1@XZ
 @ stub -arch=win64 ?_GetConcRTTraceInfo@Concurrency@@YAPEBU_CONCRT_TRACE_INFO@details@1@XZ
-@ stub ?_GetConcurrency@details@Concurrency@@YAIXZ
+@ cdecl ?_GetConcurrency@details@Concurrency@@YAIXZ() _GetConcurrency
 @ stub -arch=win32 ?_GetCurrentInlineDepth@_StackGuard@details@Concurrency@@CAAAIXZ
 @ stub -arch=win64 ?_GetCurrentInlineDepth@_StackGuard@details@Concurrency@@CAAEA_KXZ
 @ stub ?_GetNumberOfVirtualProcessors@_CurrentScheduler@details@Concurrency@@SAIXZ
diff --git a/dlls/msvcr120/msvcr120.spec b/dlls/msvcr120/msvcr120.spec
index 5077a6722e3..c2aacac3762 100644
--- a/dlls/msvcr120/msvcr120.spec
+++ b/dlls/msvcr120/msvcr120.spec
@@ -524,7 +524,7 @@
 @ stub ?_Get@_CurrentScheduler@details@Concurrency@@SA?AV_Scheduler@23@XZ
 @ stub -arch=win32 ?_GetConcRTTraceInfo@Concurrency@@YAPBU_CONCRT_TRACE_INFO@details@1@XZ
 @ stub -arch=win64 ?_GetConcRTTraceInfo@Concurrency@@YAPEBU_CONCRT_TRACE_INFO@details@1@XZ
-@ stub ?_GetConcurrency@details@Concurrency@@YAIXZ
+@ cdecl ?_GetConcurrency@details@Concurrency@@YAIXZ() _GetConcurrency
 @ stub -arch=win32 ?_GetCurrentInlineDepth@_StackGuard@details@Concurrency@@CAAAIXZ
 @ stub -arch=win64 ?_GetCurrentInlineDepth@_StackGuard@details@Concurrency@@CAAEA_KXZ
 @ stub ?_GetNumberOfVirtualProcessors@_CurrentScheduler@details@Concurrency@@SAIXZ
diff --git a/dlls/msvcr120/tests/msvcr120.c b/dlls/msvcr120/tests/msvcr120.c
index d334b511705..330c6b17a68 100644
--- a/dlls/msvcr120/tests/msvcr120.c
+++ b/dlls/msvcr120/tests/msvcr120.c
@@ -64,6 +64,7 @@ static size_t (CDECL *p_wcstombs_s)(size_t *ret, char* dest, size_t sz, const wc
 static int (CDECL *p__dsign)(double);
 static int (CDECL *p__fdsign)(float);
 static wchar_t** (CDECL *p____lc_locale_name_func)(void);
+static unsigned int (CDECL *p__GetConcurrency)(void);
 
 static BOOL init(void)
 {
@@ -82,6 +83,7 @@ static BOOL init(void)
     p__dsign = (void*)GetProcAddress(module, "_dsign");
     p__fdsign = (void*)GetProcAddress(module, "_fdsign");
     p____lc_locale_name_func = (void*)GetProcAddress(module, "___lc_locale_name_func");
+    p__GetConcurrency = (void*)GetProcAddress(module,"?_GetConcurrency@details@Concurrency@@YAIXZ");
     return TRUE;
 }
 
@@ -221,10 +223,21 @@ static void test____lc_locale_name_func(void)
     ok(!lc_names[1], "___lc_locale_name_func()[1] = %s\n", wine_dbgstr_w(lc_names[1]));
 }
 
+static void test__GetConcurrency(void)
+{
+    SYSTEM_INFO si;
+    unsigned int c;
+
+    GetSystemInfo(&si);
+    c = (*p__GetConcurrency)();
+    ok(c == si.dwNumberOfProcessors, "expected %u, got %u\n", si.dwNumberOfProcessors, c);
+}
+
 START_TEST(msvcr120)
 {
     if (!init()) return;
     test_lconv();
     test__dsign();
     test____lc_locale_name_func();
+    test__GetConcurrency();
 }
diff --git a/dlls/msvcr120_app/msvcr120_app.spec b/dlls/msvcr120_app/msvcr120_app.spec
index 3ff423d2468..392c3f7c7e9 100644
--- a/dlls/msvcr120_app/msvcr120_app.spec
+++ b/dlls/msvcr120_app/msvcr120_app.spec
@@ -522,7 +522,7 @@
 @ stub ?_Get@_CurrentScheduler@details@Concurrency@@SA?AV_Scheduler@23@XZ
 @ stub -arch=win32 ?_GetConcRTTraceInfo@Concurrency@@YAPBU_CONCRT_TRACE_INFO@details@1@XZ
 @ stub -arch=win64 ?_GetConcRTTraceInfo@Concurrency@@YAPEBU_CONCRT_TRACE_INFO@details@1@XZ
-@ stub ?_GetConcurrency@details@Concurrency@@YAIXZ
+@ cdecl ?_GetConcurrency@details@Concurrency@@YAIXZ() msvcr120.?_GetConcurrency@details@Concurrency@@YAIXZ
 @ stub -arch=win32 ?_GetCurrentInlineDepth@_StackGuard@details@Concurrency@@CAAAIXZ
 @ stub -arch=win64 ?_GetCurrentInlineDepth@_StackGuard@details@Concurrency@@CAAEA_KXZ
 @ stub ?_GetNumberOfVirtualProcessors@_CurrentScheduler@details@Concurrency@@SAIXZ
diff --git a/dlls/msvcrt/lock.c b/dlls/msvcrt/lock.c
index 6d903dcff32..e69e1b9dd26 100644
--- a/dlls/msvcrt/lock.c
+++ b/dlls/msvcrt/lock.c
@@ -537,6 +537,24 @@ void __thiscall critical_section_scoped_lock_dtor(critical_section_scoped_lock *
     TRACE("(%p)\n", this);
     critical_section_unlock(this->cs);
 }
+
+/* ?_GetConcurrency@details@Concurrency@@YAIXZ */
+unsigned int __cdecl _GetConcurrency(void)
+{
+    static unsigned int val = -1;
+
+    TRACE("()\n");
+
+    if(val == -1) {
+        SYSTEM_INFO si;
+
+        GetSystemInfo(&si);
+        val = si.dwNumberOfProcessors;
+    }
+
+    return val;
+}
+
 #endif
 
 /**********************************************************************