diff --git a/arch/powerpc/include/asm/reg.h b/arch/powerpc/include/asm/reg.h
index 97efbe2973fab..ae71027d3ca23 100644
--- a/arch/powerpc/include/asm/reg.h
+++ b/arch/powerpc/include/asm/reg.h
@@ -1479,7 +1479,7 @@ static inline void update_power8_hid0(unsigned long hid0)
 {
 	/*
 	 *  The HID0 update on Power8 should at the very least be
-	 *  preceded by a a SYNC instruction followed by an ISYNC
+	 *  preceded by a SYNC instruction followed by an ISYNC
 	 *  instruction
 	 */
 	asm volatile("sync; mtspr %0,%1; isync":: "i"(SPRN_HID0), "r"(hid0));