diff --git a/dlls/setupapi/devinst.c b/dlls/setupapi/devinst.c
index 3ac0c7d280..32fc3fa596 100644
--- a/dlls/setupapi/devinst.c
+++ b/dlls/setupapi/devinst.c
@@ -776,6 +776,36 @@ BOOL WINAPI SetupDiEnumDeviceInfo(
     return FALSE;
 }
 
+/***********************************************************************
+ *		SetupDiGetDeviceInstanceIdA (SETUPAPI.@)
+ */
+BOOL WINAPI SetupDiGetDeviceInstanceIdA(
+	HDEVINFO DeviceInfoSet,
+	PSP_DEVINFO_DATA DeviceInfoData,
+	PSTR DeviceInstanceId,
+	DWORD DeviceInstanceIdSize,
+	PDWORD RequiredSize)
+{
+    FIXME("%p %p %p %d %p\n", DeviceInfoSet, DeviceInfoData, DeviceInstanceId,
+	    DeviceInstanceIdSize, RequiredSize);
+    return FALSE;
+}
+
+/***********************************************************************
+ *		SetupDiGetDeviceInstanceIdW (SETUPAPI.@)
+ */
+BOOL WINAPI SetupDiGetDeviceInstanceIdW(
+	HDEVINFO DeviceInfoSet,
+	PSP_DEVINFO_DATA DeviceInfoData,
+	PWSTR DeviceInstanceId,
+	DWORD DeviceInstanceIdSize,
+	PDWORD RequiredSize)
+{
+    FIXME("%p %p %p %d %p\n", DeviceInfoSet, DeviceInfoData, DeviceInstanceId,
+	    DeviceInstanceIdSize, RequiredSize);
+    return FALSE;
+}
+
 /***********************************************************************
  *		SetupDiGetActualSectionToInstallA (SETUPAPI.@)
  */
diff --git a/dlls/setupapi/setupapi.spec b/dlls/setupapi/setupapi.spec
index d6a6b6e633..1ca28afea7 100644
--- a/dlls/setupapi/setupapi.spec
+++ b/dlls/setupapi/setupapi.spec
@@ -324,8 +324,8 @@
 @ stdcall SetupDiGetDeviceInfoListDetailW(ptr ptr)
 @ stdcall SetupDiGetDeviceInstallParamsA(ptr ptr ptr)
 @ stub SetupDiGetDeviceInstallParamsW
-@ stub SetupDiGetDeviceInstanceIdA
-@ stub SetupDiGetDeviceInstanceIdW
+@ stdcall SetupDiGetDeviceInstanceIdA(ptr ptr ptr long ptr)
+@ stdcall SetupDiGetDeviceInstanceIdW(ptr ptr ptr long ptr)
 @ stub SetupDiGetDeviceInterfaceAlias
 @ stdcall SetupDiGetDeviceInterfaceDetailA(long ptr ptr long ptr ptr)
 @ stdcall SetupDiGetDeviceInterfaceDetailW(long ptr ptr long ptr ptr)