diff --git a/dlls/setupapi/devinst16.c b/dlls/setupapi/devinst16.c
index 0c402621410..54e5e10c5b1 100644
--- a/dlls/setupapi/devinst16.c
+++ b/dlls/setupapi/devinst16.c
@@ -55,6 +55,16 @@ RETERR16 WINAPI DiBuildCompatDrvList16(LPDEVICE_INFO16 lpdi)
     return FALSE;
 }
 
+/***********************************************************************
+ *	        DiBuildClassDrvList (SETUPX.301)
+ */
+RETERR16 WINAPI DiBuildClassDrvList16(LPDEVICE_INFO16 lpdi)
+{
+    FIXME("(%p): stub\n", lpdi);
+    lpdi->lpCompatDrvList = NULL;
+    return FALSE;
+}
+
 /***********************************************************************
  *		DiCallClassInstaller (SETUPX.308)
  */
diff --git a/dlls/setupapi/setupx.spec b/dlls/setupapi/setupx.spec
index c7172ef163b..be6bcfd640f 100644
--- a/dlls/setupapi/setupx.spec
+++ b/dlls/setupapi/setupx.spec
@@ -135,7 +135,7 @@
 213  pascal -ret16 vcpUICallbackProc(ptr word word long long) vcpUICallbackProc16
 214  stub     VcpAddMRUPath #(str)
 300  pascal -ret16 DiBuildCompatDrvList (ptr) DiBuildCompatDrvList16
-301  stub     DiBuildClassDrvList #(ptr)
+301  pascal -ret16 DiBuildClassDrvList (ptr) DiBuildClassDrvList16
 302  stub     DiDestroyDriverNodeList #(ptr)
 303  pascal -ret16 DiCreateDeviceInfo (ptr str long long str str word) DiCreateDeviceInfo16
 304  pascal -ret16 DiGetClassDevs(ptr str word word) DiGetClassDevs16