diff --git a/gcc/config/arm/arm.c b/gcc/config/arm/arm.c
index 17f00b5a1de21de35366b82040a7ad46d65f899e..ee3ebe4561ea3d9791fabdfcec8b16af63bd4d20 100644
--- a/gcc/config/arm/arm.c
+++ b/gcc/config/arm/arm.c
@@ -10321,8 +10321,10 @@ arm_new_rtx_costs (rtx x, enum rtx_code code, enum rtx_code outer_code,
 	      /* SMUL[TB][TB].  */
 	      if (speed_p)
 		*cost += extra_cost->mult[0].extend;
-	      *cost += rtx_cost (XEXP (x, 0), mode, SIGN_EXTEND, 0, speed_p);
-	      *cost += rtx_cost (XEXP (x, 1), mode, SIGN_EXTEND, 1, speed_p);
+	      *cost += rtx_cost (XEXP (XEXP (x, 0), 0), mode,
+				 SIGN_EXTEND, 0, speed_p);
+	      *cost += rtx_cost (XEXP (XEXP (x, 1), 0), mode,
+				 SIGN_EXTEND, 1, speed_p);
 	      return true;
 	    }
 	  if (speed_p)