diff --git a/dlls/msvcp140/msvcp140.spec b/dlls/msvcp140/msvcp140.spec
index 1e8f85fe216..922aa9ea6f5 100644
--- a/dlls/msvcp140/msvcp140.spec
+++ b/dlls/msvcp140/msvcp140.spec
@@ -3770,7 +3770,7 @@
 @ stub __crtGetSystemTimePreciseAsFileTime
 @ stub __crtGetTickCount64
 @ stub __crtInitOnceExecuteOnce
-@ stub __crtInitializeCriticalSectionEx
+@ cdecl __crtInitializeCriticalSectionEx(ptr long long) MSVCP__crtInitializeCriticalSectionEx
 @ stub __crtIsPackagedApp
 @ cdecl __crtLCMapStringA(long long str long ptr long long long) msvcrt.__crtLCMapStringA
 @ stub __crtLCMapStringEx
diff --git a/dlls/msvcp90/misc.c b/dlls/msvcp90/misc.c
index 81a5fbb7d87..2037e699d3c 100644
--- a/dlls/msvcp90/misc.c
+++ b/dlls/msvcp90/misc.c
@@ -1066,6 +1066,16 @@ void __asm_dummy_vtables(void) {
 }
 #endif
 
+/*********************************************************************
+ *  __crtInitializeCriticalSectionEx (MSVCP140.@)
+ */
+BOOL CDECL MSVCP__crtInitializeCriticalSectionEx(
+        CRITICAL_SECTION *cs, DWORD spin_count, DWORD flags)
+{
+    TRACE("(%p %x %x)\n", cs, spin_count, flags);
+    return InitializeCriticalSectionEx(cs, spin_count, flags);
+}
+
 void init_misc(void *base)
 {
 #ifdef __x86_64__