diff --git a/module_usb_audio/main.xc b/module_usb_audio/main.xc
index 036a4cca..93966acb 100755
--- a/module_usb_audio/main.xc
+++ b/module_usb_audio/main.xc
@@ -138,16 +138,18 @@ on tile[AUDIO_IO_TILE] : clock    clk_mst_spd               = XS1_CLKBLK_1;
 #endif
 
 /* L Series needs a port to use for USB reset */
-#if defined(ARCH_L) || defined(ARCH_G)
-#ifdef PORT_USB_RESET
+#if (defined(ARCH_L) || defined(ARCH_G)) && defined(PORT_USB_RESET)
 /* This define is checked since it could be on a shift reg or similar */
 on tile[XUD_TILE] : out port p_usb_rst                      = PORT_USB_RESET;
+#else
+/* Reset port not required for U series due to built in Phy */
+#define p_usb_rst   null
 #endif
+
+#if defined (ARCH_L) || defined(ARCH_G)
 /* L Series also needs a clock for this port */
 on tile[XUD_TILE] : clock clk                               = XS1_CLKBLK_4;
 #else
-/* Reset port not required for SU1 due to built in Phy */
-#define p_usb_rst   null
 #define clk         null
 #endif