diff --git a/src/drivers/usb/ehci.h b/src/drivers/usb/ehci.h
index b9054cfb1c..3feab86599 100644
--- a/src/drivers/usb/ehci.h
+++ b/src/drivers/usb/ehci.h
@@ -97,7 +97,7 @@ struct ehci_regs {
 #define FLAG_CF		(1<<0)		/* true: we'll support "high speed" */
 
 	/* PORTSC: offset 0x44 */
-	u32		port_status[0];	/* up to N_PORTS */
+	u32		port_status[];	/* up to N_PORTS */
 /* EHCI 1.1 addendum */
 #define PORTSC_SUSPEND_STS_ACK 0
 #define PORTSC_SUSPEND_STS_NYET 1