diff --git a/src/libc/string/target/sh-generic/memset.S b/src/libc/string/target/sh-generic/memset.S
index 4aa6a8a..7dab6e3 100644
--- a/src/libc/string/target/sh-generic/memset.S
+++ b/src/libc/string/target/sh-generic/memset.S
@@ -12,12 +12,12 @@ _memset:
 	/* When setting less than 64 bytes, use the naive method */
 	mov	#64, r0
 	cmp/ge	r6, r0
-	bt	_naive_memset
+	bt.s	_naive_memset
+	mov	r5, r0
 
 	mov	#3, r2
 
 	/* Make a 4-byte filler */
-	mov	r5, r0
 	shll8	r5
 	or	r5, r0
 	mov	r0, r5
@@ -59,7 +59,7 @@ _naive_memset:
 	/* Tight loop copy one byte */
 	dt	r6
 	bf/s	_naive_memset
-	mov.b	r5, @-r4
+	mov.b	r0, @-r4
 
 .end:
 	rts