diff --git a/dlls/cfgmgr32/cfgmgr32.spec b/dlls/cfgmgr32/cfgmgr32.spec
index 44097ef7f8..450ce02c32 100644
--- a/dlls/cfgmgr32/cfgmgr32.spec
+++ b/dlls/cfgmgr32/cfgmgr32.spec
@@ -57,7 +57,7 @@
 @ stub CM_Get_DevNode_Registry_PropertyA
 @ stub CM_Get_DevNode_Registry_PropertyW
 @ stub CM_Get_DevNode_Registry_Property_ExA
-@ stub CM_Get_DevNode_Registry_Property_ExW
+@ stdcall CM_Get_DevNode_Registry_Property_ExW(long long ptr ptr ptr long ptr) setupapi.CM_Get_DevNode_Registry_Property_ExW
 @ stub CM_Get_DevNode_Status
 @ stub CM_Get_DevNode_Status_Ex
 @ stdcall CM_Get_Device_IDA(ptr ptr long long) setupapi.CM_Get_Device_IDA
diff --git a/dlls/setupapi/setupapi.spec b/dlls/setupapi/setupapi.spec
index 25639f530d..2d5d80a325 100644
--- a/dlls/setupapi/setupapi.spec
+++ b/dlls/setupapi/setupapi.spec
@@ -68,7 +68,7 @@
 @ stub CM_Get_DevNode_Registry_PropertyA
 @ stub CM_Get_DevNode_Registry_PropertyW
 @ stub CM_Get_DevNode_Registry_Property_ExA
-@ stub CM_Get_DevNode_Registry_Property_ExW
+@ stdcall CM_Get_DevNode_Registry_Property_ExW(long long ptr ptr ptr long ptr)
 @ stub CM_Get_DevNode_Status
 @ stub CM_Get_DevNode_Status_Ex
 @ stdcall CM_Get_Device_IDA(ptr ptr long long)
diff --git a/dlls/setupapi/stubs.c b/dlls/setupapi/stubs.c
index f53b3adc04..b43a343c8e 100644
--- a/dlls/setupapi/stubs.c
+++ b/dlls/setupapi/stubs.c
@@ -358,6 +358,16 @@ CONFIGRET WINAPI CM_Get_Device_Interface_List_Size_ExW(PULONG len, LPGUID class,
     return CR_FAILURE;
 }
 
+/***********************************************************************
+ *      CM_Get_DevNode_Registry_Property_ExW (SETUPAPI.@)
+ */
+CONFIGRET WINAPI CM_Get_DevNode_Registry_Property_ExW(DEVINST dev, ULONG prop, PULONG regdatatype,
+    PVOID buf, PULONG len, ULONG flags, HMACHINE machine)
+{
+    FIXME("0x%08x %u %p %p %p 0x%08x %p: stub\n", dev, prop, regdatatype, buf, len, flags, machine);
+    return CR_FAILURE;
+}
+
 /***********************************************************************
  *      CM_Enumerate_Classes (SETUPAPI.@)
  */