diff --git a/lib/builtins/arm/udivsi3.S b/lib/builtins/arm/udivsi3.S
index 19fea56..a3939f5 100644
--- a/lib/builtins/arm/udivsi3.S
+++ b/lib/builtins/arm/udivsi3.S
@@ -35,9 +35,7 @@
 #if __ARM_ARCH_EXT_IDIV__
 	tst     r1, r1
 	beq     LOCAL_LABEL(divby0)
-	mov 	r3, r0
-	udiv	r0, r3, r1
-	mls 	r1, r0, r1, r3
+	udiv	r0, r0, r1
 	bx  	lr
 #else
 	cmp	r1, #1
diff --git a/lib/builtins/arm/umodsi3.S b/lib/builtins/arm/umodsi3.S
index e81af0c..993ac8b 100644
--- a/lib/builtins/arm/umodsi3.S
+++ b/lib/builtins/arm/umodsi3.S
@@ -33,10 +33,8 @@
 #if __ARM_ARCH_EXT_IDIV__
 	tst     r1, r1
 	beq     LOCAL_LABEL(divby0)
-	mov 	r3, r0
-	udiv	r0, r3, r1
-	mls 	r1, r0, r1, r3
-	str 	r1, [r2]
+	udiv	r2, r0, r1
+	mls 	r0, r2, r1, r0
 	bx  	lr
 #else
 	cmp	r1, #1