diff --git a/gcc/config/sh/predicates.md b/gcc/config/sh/predicates.md
index ff6a1a2..2789e51 100644
--- a/gcc/config/sh/predicates.md
+++ b/gcc/config/sh/predicates.md
@@ -112,13 +112,14 @@
          || satisfies_constraint_Css (op))
        return 1;
       else if (GET_CODE (op) == TRUNCATE
+              && register_operand (XEXP (op, 0), VOIDmode)
               && ! system_reg_operand (XEXP (op, 0), VOIDmode)
               && (mode == VOIDmode || mode == GET_MODE (op))
               && (GET_MODE_SIZE (GET_MODE (op))
                   < GET_MODE_SIZE (GET_MODE (XEXP (op, 0))))
               && (! FP_REGISTER_P (REGNO (XEXP (op, 0)))
                   || GET_MODE_SIZE (GET_MODE (op)) == 4))
-       return register_operand (XEXP (op, 0), VOIDmode);
+       return 1;
       else
        return 0;
     }