diff --git a/gcc/config/arm/arm.c b/gcc/config/arm/arm.c
index fc3a508..265e1cb 100644
--- a/gcc/config/arm/arm.c
+++ b/gcc/config/arm/arm.c
@@ -25437,8 +25437,8 @@ arm_expand_compare_and_swap (rtx operands[])
     case SImode:
       /* Force the value into a register if needed.  We waited until after
 	 the zero-extension above to do this properly.  */
-      if (!arm_add_operand (oldval, mode))
-	oldval = force_reg (mode, oldval);
+      if (!arm_add_operand (oldval, SImode))
+	oldval = force_reg (SImode, oldval);
       break;

     case DImode: