diff --git a/reactos/dll/win32/cfgmgr32/cfgmgr32.spec b/reactos/dll/win32/cfgmgr32/cfgmgr32.spec
index 4b6fb69f83d..d8ebbe78e47 100644
--- a/reactos/dll/win32/cfgmgr32/cfgmgr32.spec
+++ b/reactos/dll/win32/cfgmgr32/cfgmgr32.spec
@@ -1,5 +1,5 @@
 @ stdcall CMP_Init_Detection(long) setupapi.CMP_Init_Detection
-@ stub CMP_RegisterNotification # setupapi.CMP_RegisterNotification
+@ stdcall CMP_RegisterNotification(ptr ptr long ptr) setupapi.CMP_RegisterNotification
 @ stdcall CMP_Report_LogOn(long long) setupapi.CMP_Report_LogOn
 @ stub CMP_UnregisterNotification # setupapi.CMP_UnregisterNotification
 @ stdcall CMP_WaitNoPendingInstallEvents(long) setupapi.CMP_WaitNoPendingInstallEvents
diff --git a/reactos/dll/win32/setupapi/setupapi.spec b/reactos/dll/win32/setupapi/setupapi.spec
index 793be954721..0eee7b60756 100644
--- a/reactos/dll/win32/setupapi/setupapi.spec
+++ b/reactos/dll/win32/setupapi/setupapi.spec
@@ -2,7 +2,7 @@
 @ stub CMP_GetBlockedDriverInfo
 @ stub CMP_GetServerSideDeviceInstallFlags
 @ stdcall CMP_Init_Detection(long)
-@ stdcall CMP_RegisterNotification( ptr ptr long ptr)
+@ stdcall CMP_RegisterNotification(ptr ptr long ptr)
 @ stdcall CMP_Report_LogOn(long long)
 @ stub CMP_UnregisterNotification
 @ stdcall CMP_WaitNoPendingInstallEvents(long)