diff --git a/dlls/mapi32/mapi32.spec b/dlls/mapi32/mapi32.spec
index f5a1befea9b..560784ca193 100644
--- a/dlls/mapi32/mapi32.spec
+++ b/dlls/mapi32/mapi32.spec
@@ -175,7 +175,7 @@
 236 stub cmc_read
 237 stub cmc_send
 238 stub cmc_send_documents
-239 stub HrDispatchNotifications@4
+239 stdcall HrDispatchNotifications@4(long) HrDispatchNotifications
 241 stub HrValidateParameters@8
 244 stub ScCreateConversationIndex@16
 246 stub HrGetOmiProvidersFlags
diff --git a/dlls/mapi32/util.c b/dlls/mapi32/util.c
index 1d16a332c45..13e4affc39c 100644
--- a/dlls/mapi32/util.c
+++ b/dlls/mapi32/util.c
@@ -238,6 +238,15 @@ HRESULT WINAPI WrapProgress(PVOID unk1, PVOID unk2, PVOID unk3, PVOID unk4, PVOI
     return MAPI_E_NO_SUPPORT;
 }
 
+/*************************************************************************
+ * HrDispatchNotifications@4 (MAPI32.239)
+ */
+HRESULT WINAPI HrDispatchNotifications(ULONG flags)
+{
+    FIXME("(%08x)\n", flags);
+    return S_OK;
+}
+
 /*************************************************************************
  * HrThisThreadAdviseSink@8 (MAPI32.42)
  *