diff --git a/src/cmd/internal/obj/arm/asm5.go b/src/cmd/internal/obj/arm/asm5.go
index e50dcf56f89902..610637c42edea3 100644
--- a/src/cmd/internal/obj/arm/asm5.go
+++ b/src/cmd/internal/obj/arm/asm5.go
@@ -472,8 +472,8 @@ func asmoutnacl(ctxt *obj.Link, origPC int32, p *obj.Prog, o *Optab, out []uint3
 			break
 		}
 
-		if (p.To.Type == obj.TYPE_MEM && p.To.Reg != REG_R13 && p.To.Reg != REG_R9) || // MOVW Rx, X(Ry), y != 13 && y != 9
-			(p.From.Type == obj.TYPE_MEM && p.From.Reg != REG_R13 && p.From.Reg != REG_R9) { // MOVW X(Rx), Ry, x != 13 && x != 9
+		if (p.To.Type == obj.TYPE_MEM && p.To.Reg != REG_R9) || // MOVW Rx, X(Ry), y != 9
+			(p.From.Type == obj.TYPE_MEM && p.From.Reg != REG_R9) { // MOVW X(Rx), Ry, x != 9
 			var a *obj.Addr
 			if p.To.Type == obj.TYPE_MEM {
 				a = &p.To