diff --git a/arch/mips/cavium-octeon/octeon-usb.c b/arch/mips/cavium-octeon/octeon-usb.c
index 1f730ded5224..cc88a08bc1f7 100644
--- a/arch/mips/cavium-octeon/octeon-usb.c
+++ b/arch/mips/cavium-octeon/octeon-usb.c
@@ -398,6 +398,7 @@ static int dwc3_octeon_clocks_start(struct device *dev, u64 base)
 	default:
 		dev_err(dev, "Invalid ref_clk %u, using 100000000 instead\n",
 			clock_rate);
+		/* fall through */
 	case 100000000:
 		mpll_mul = 0x19;
 		if (ref_clk_sel < 2)