diff --git a/dlls/api-ms-win-core-com-l1-1-0/api-ms-win-core-com-l1-1-0.spec b/dlls/api-ms-win-core-com-l1-1-0/api-ms-win-core-com-l1-1-0.spec
index aea0fef6872..bc85dda7fa3 100644
--- a/dlls/api-ms-win-core-com-l1-1-0/api-ms-win-core-com-l1-1-0.spec
+++ b/dlls/api-ms-win-core-com-l1-1-0/api-ms-win-core-com-l1-1-0.spec
@@ -11,7 +11,7 @@
 @ stub CoCreateInstanceFromApp
 @ stub CoDecodeProxy
 @ stub CoDecrementMTAUsage
-@ stub CoDisableCallCancellation
+@ stdcall CoDisableCallCancellation(ptr) ole32.CoDisableCallCancellation
 @ stub CoDisconnectContext
 @ stdcall CoDisconnectObject(ptr long) ole32.CoDisconnectObject
 @ stdcall CoEnableCallCancellation(ptr) ole32.CoEnableCallCancellation
diff --git a/dlls/api-ms-win-core-com-l1-1-1/api-ms-win-core-com-l1-1-1.spec b/dlls/api-ms-win-core-com-l1-1-1/api-ms-win-core-com-l1-1-1.spec
index 3cfdedae38c..9a8f1da3ccd 100644
--- a/dlls/api-ms-win-core-com-l1-1-1/api-ms-win-core-com-l1-1-1.spec
+++ b/dlls/api-ms-win-core-com-l1-1-1/api-ms-win-core-com-l1-1-1.spec
@@ -11,7 +11,7 @@
 @ stub CoCreateInstanceFromApp
 @ stub CoDecodeProxy
 @ stub CoDecrementMTAUsage
-@ stub CoDisableCallCancellation
+@ stdcall CoDisableCallCancellation(ptr) ole32.CoDisableCallCancellation
 @ stub CoDisconnectContext
 @ stdcall CoDisconnectObject(ptr long) ole32.CoDisconnectObject
 @ stdcall CoEnableCallCancellation(ptr) ole32.CoEnableCallCancellation
diff --git a/dlls/combase/combase.spec b/dlls/combase/combase.spec
index 76bd66558b3..93575d56842 100644
--- a/dlls/combase/combase.spec
+++ b/dlls/combase/combase.spec
@@ -82,7 +82,7 @@
 @ stub CoDeactivateObject
 @ stub CoDecodeProxy
 @ stub CoDecrementMTAUsage
-@ stub CoDisableCallCancellation
+@ stdcall CoDisableCallCancellation(ptr) ole32.CoDisableCallCancellation
 @ stub CoDisconnectContext
 @ stdcall CoDisconnectObject(ptr long) ole32.CoDisconnectObject
 @ stdcall CoEnableCallCancellation(ptr) ole32.CoEnableCallCancellation
diff --git a/dlls/ole32/compobj.c b/dlls/ole32/compobj.c
index 385a8df9227..fc93a2afad9 100644
--- a/dlls/ole32/compobj.c
+++ b/dlls/ole32/compobj.c
@@ -5197,6 +5197,16 @@ HRESULT WINAPI CoGetApartmentType(APTTYPE *type, APTTYPEQUALIFIER *qualifier)
     return info->apt ? S_OK : CO_E_NOTINITIALIZED;
 }
 
+/***********************************************************************
+ *           CoDisableCallCancellation [OLE32.@]
+ */
+HRESULT WINAPI CoDisableCallCancellation(void *reserved)
+{
+    FIXME("(%p): stub\n", reserved);
+
+    return E_NOTIMPL;
+}
+
 /***********************************************************************
  *           CoEnableCallCancellation [OLE32.@]
  */
diff --git a/dlls/ole32/ole32.spec b/dlls/ole32/ole32.spec
index b2db3fdf044..5e0e7030b22 100644
--- a/dlls/ole32/ole32.spec
+++ b/dlls/ole32/ole32.spec
@@ -14,6 +14,7 @@
 @ stdcall CoCreateGuid(ptr)
 @ stdcall CoCreateInstance(ptr ptr long ptr ptr)
 @ stdcall CoCreateInstanceEx(ptr ptr long ptr long ptr)
+@ stdcall CoDisableCallCancellation(ptr)
 @ stdcall CoDisconnectObject(ptr long)
 @ stdcall CoDosDateTimeToFileTime(long long ptr) kernel32.DosDateTimeToFileTime
 @ stdcall CoEnableCallCancellation(ptr)