diff --git a/drivers/usb/host/xhci.h b/drivers/usb/host/xhci.h
index 63582719e0fb..ca550ddb0b1d 100644
--- a/drivers/usb/host/xhci.h
+++ b/drivers/usb/host/xhci.h
@@ -1239,7 +1239,7 @@ union xhci_trb {
 /* Allow two commands + a link TRB, along with any reserved command TRBs */
 #define MAX_RSVD_CMD_TRBS	(TRBS_PER_SEGMENT - 3)
 #define SEGMENT_SIZE		(TRBS_PER_SEGMENT*16)
-#define SEGMENT_SHIFT		(__ffs(SEGMENT_SIZE))
+#define SEGMENT_SHIFT		(ilog2(SEGMENT_SIZE))
 /* TRB buffer pointers can't cross 64KB boundaries */
 #define TRB_MAX_BUFF_SHIFT		16
 #define TRB_MAX_BUFF_SIZE	(1 << TRB_MAX_BUFF_SHIFT)