diff --git a/bin/sh/arith_yacc.c b/bin/sh/arith_yacc.c
index 46df8477d0b..5000c6b0d1b 100644
--- a/bin/sh/arith_yacc.c
+++ b/bin/sh/arith_yacc.c
@@ -139,10 +139,9 @@ static arith_t do_binop(int op, arith_t a, arith_t b)
 	case ARITH_SUB:
 		return (uintmax_t)a - (uintmax_t)b;
 	case ARITH_LSHIFT:
-		return (uintmax_t)a <<
-		    ((uintmax_t)b & (sizeof(uintmax_t) * CHAR_BIT - 1));
+		return (uintmax_t)a << (b & (sizeof(uintmax_t) * CHAR_BIT - 1));
 	case ARITH_RSHIFT:
-		return a >> ((uintmax_t)b & (sizeof(uintmax_t) * CHAR_BIT - 1));
+		return a >> (b & (sizeof(uintmax_t) * CHAR_BIT - 1));
 	case ARITH_LT:
 		return a < b;
 	case ARITH_LE: