diff --git a/reactos/lib/setupapi/devinst.c b/reactos/lib/setupapi/devinst.c
index 7669a0ed2d8..c05b63fc00b 100644
--- a/reactos/lib/setupapi/devinst.c
+++ b/reactos/lib/setupapi/devinst.c
@@ -2952,6 +2952,20 @@ BOOL WINAPI SetupDiSetClassInstallParamsA(
     return FALSE;
 }
 
+/***********************************************************************
+ *		SetupDiSetClassInstallParamsW (SETUPAPI.@)
+ */
+BOOL WINAPI SetupDiSetClassInstallParamsW(
+       HDEVINFO  DeviceInfoSet,
+       PSP_DEVINFO_DATA DeviceInfoData,
+       PSP_CLASSINSTALL_HEADER ClassInstallParams,
+       DWORD ClassInstallParamsSize)
+{
+    FIXME("%p %p %x %lu\n",DeviceInfoSet, DeviceInfoData,
+          ClassInstallParams->InstallFunction, ClassInstallParamsSize);
+    return FALSE;
+}
+
 static DWORD
 GetFunctionPointer(
         IN PWSTR InstallerName,
diff --git a/reactos/lib/setupapi/setupapi.spec b/reactos/lib/setupapi/setupapi.spec
index 3426807e074..105a02e5ab8 100644
--- a/reactos/lib/setupapi/setupapi.spec
+++ b/reactos/lib/setupapi/setupapi.spec
@@ -373,7 +373,7 @@
 @ stub SetupDiSelectDevice
 @ stub SetupDiSelectOEMDrv
 @ stdcall SetupDiSetClassInstallParamsA(ptr ptr ptr long)
-@ stub SetupDiSetClassInstallParamsW
+@ stdcall SetupDiSetClassInstallParamsW(ptr ptr ptr long)
 @ stub SetupDiSetDeviceInstallParamsA
 @ stdcall SetupDiSetDeviceInstallParamsW(ptr ptr ptr)
 @ stdcall SetupDiSetDeviceRegistryPropertyA(ptr ptr long ptr long)