diff --git a/dlls/cfgmgr32/cfgmgr32.spec b/dlls/cfgmgr32/cfgmgr32.spec
index efc5dbbf645..2ccd29b108d 100644
--- a/dlls/cfgmgr32/cfgmgr32.spec
+++ b/dlls/cfgmgr32/cfgmgr32.spec
@@ -113,7 +113,7 @@
 @ stub CM_Get_Res_Des_Data_Size
 @ stub CM_Get_Res_Des_Data_Size_Ex
 @ stub CM_Get_Sibling
-@ stub CM_Get_Sibling_Ex
+@ stdcall CM_Get_Sibling_Ex(ptr long long ptr) setupapi.CM_Get_Sibling_Ex
 @ stdcall CM_Get_Version() setupapi.CM_Get_Version
 @ stub CM_Get_Version_Ex
 @ stub CM_Intersect_Range_List
diff --git a/dlls/setupapi/setupapi.spec b/dlls/setupapi/setupapi.spec
index 88476d6c4b4..ab2090d0f53 100644
--- a/dlls/setupapi/setupapi.spec
+++ b/dlls/setupapi/setupapi.spec
@@ -124,7 +124,7 @@
 @ stub CM_Get_Res_Des_Data_Size
 @ stub CM_Get_Res_Des_Data_Size_Ex
 @ stub CM_Get_Sibling
-@ stub CM_Get_Sibling_Ex
+@ stdcall CM_Get_Sibling_Ex(ptr long long ptr)
 @ stdcall CM_Get_Version()
 @ stub CM_Get_Version_Ex
 @ stub CM_Intersect_Range_List
diff --git a/dlls/setupapi/stubs.c b/dlls/setupapi/stubs.c
index a738eec25a9..9ea23b76dfa 100644
--- a/dlls/setupapi/stubs.c
+++ b/dlls/setupapi/stubs.c
@@ -499,6 +499,16 @@ CONFIGRET WINAPI CM_Get_Class_Registry_PropertyW(LPGUID class, ULONG prop, PULON
     return CR_FAILURE;
 }
 
+/***********************************************************************
+ *             CM_Get_Sibling_Ex  (SETUPAPI.@)
+ */
+CONFIGRET WINAPI CM_Get_Sibling_Ex(
+    PDEVINST pdnDevInst, DEVINST DevInst, ULONG ulFlags, HMACHINE hMachine)
+{
+    FIXME("%p 0x%08x 0x%08x %p: stub\n", pdnDevInst, DevInst, ulFlags, hMachine);
+    return CR_FAILURE;
+}
+
 CONFIGRET WINAPI CM_Reenumerate_DevNode(DEVINST dnDevInst, ULONG ulFlags)
 {
     FIXME("0x%08x 0x%08x: stub\n", dnDevInst, ulFlags);
diff --git a/include/cfgmgr32.h b/include/cfgmgr32.h
index 857306712eb..b8def604aa7 100644
--- a/include/cfgmgr32.h
+++ b/include/cfgmgr32.h
@@ -189,6 +189,8 @@ CMAPI CONFIGRET WINAPI CM_Create_DevNodeA(PDEVINST,DEVINSTID_A,DEVINST,ULONG);
 CMAPI CONFIGRET WINAPI CM_Create_DevNodeW(PDEVINST,DEVINSTID_W,DEVINST,ULONG);
 #define     CM_Create_DevNode WINELIB_NAME_AW(CM_Create_DevNode)
 CMAPI CONFIGRET WINAPI CM_Disconnect_Machine(HMACHINE);
+CMAPI CONFIGRET WINAPI CM_Get_Child(PDEVINST pdnDevInst, DEVINST dnDevInst, ULONG ulFlags);
+CMAPI CONFIGRET WINAPI CM_Get_Child_Ex(PDEVINST pdnDevInst, DEVINST dnDevInst, ULONG ulFlags, HMACHINE hMachine);
 CMAPI CONFIGRET WINAPI CM_Get_Device_IDA(DEVINST,PSTR,ULONG,ULONG);
 CMAPI CONFIGRET WINAPI CM_Get_Device_IDW(DEVINST,PWSTR,ULONG,ULONG);
 #define     CM_Get_Device_ID WINELIB_NAME_AW(CM_Get_Device_ID)
@@ -203,14 +205,13 @@ CMAPI CONFIGRET WINAPI CM_Get_Device_ID_List_ExW(PCWSTR,PWCHAR,ULONG,ULONG,HMACH
 #define     CM_Get_Device_ID_List_Ex WINELIB_NAME_AW(CM_Get_Device_ID_List_Ex)
 CMAPI CONFIGRET WINAPI CM_Get_Device_ID_Size(PULONG,DEVINST,ULONG);
 CMAPI CONFIGRET WINAPI CM_Get_Device_ID_Size_Ex(PULONG,DEVINST,ULONG,HMACHINE);
+CMAPI CONFIGRET WINAPI CM_Get_Sibling_Ex(PDEVINST pdnDevInst, DEVINST DevInst, ULONG ulFlags, HMACHINE hMachine);
 CMAPI WORD      WINAPI CM_Get_Version(void);
 CMAPI CONFIGRET WINAPI CM_Locate_DevNodeA(PDEVINST,DEVINSTID_A,ULONG);
 CMAPI CONFIGRET WINAPI CM_Locate_DevNodeW(PDEVINST,DEVINSTID_W,ULONG);
 #define     CM_Locate_DevNode WINELIB_NAME_AW(CM_Locate_DevNode)
 CMAPI CONFIGRET WINAPI CM_Open_DevNode_Key(DEVINST dnDevInst, REGSAM access, ULONG ulHardwareProfile,
                                            REGDISPOSITION disposition, PHKEY phkDevice, ULONG ulFlags);
-CMAPI CONFIGRET WINAPI CM_Get_Child(PDEVINST pdnDevInst, DEVINST dnDevInst, ULONG ulFlags);
-CMAPI CONFIGRET WINAPI CM_Get_Child_Ex(PDEVINST pdnDevInst, DEVINST dnDevInst, ULONG ulFlags, HMACHINE hMachine);
 
 #ifdef __cplusplus
 }