diff --git a/src/soc/amd/stoneyridge/include/soc/southbridge.h b/src/soc/amd/stoneyridge/include/soc/southbridge.h
index 403e980669..ce0af95a20 100644
--- a/src/soc/amd/stoneyridge/include/soc/southbridge.h
+++ b/src/soc/amd/stoneyridge/include/soc/southbridge.h
@@ -154,7 +154,7 @@
 #define EHCI_HUB_CONFIG4		0x90
 #define   DEBUG_PORT_SELECT_SHIFT	  16
 #define   DEBUG_PORT_ENABLE		  BIT(18)
-#define   DEBUG_PORT_MASK		(BIT(16) | BIT(17) | (BIT(18))
+#define   DEBUG_PORT_MASK		(BIT(16) | BIT(17) | BIT(18))
 
 #define WIDEIO_RANGE_ERROR		-1
 #define TOTAL_WIDEIO_PORTS		3