diff --git a/bin/sh/arith_yacc.c b/bin/sh/arith_yacc.c
index 8aab8fbcb1a3..edb321ff05f2 100644
--- a/bin/sh/arith_yacc.c
+++ b/bin/sh/arith_yacc.c
@@ -198,7 +198,7 @@ static arith_t primary(int token, union yystype *val, int op, int noeval)
 	}
 }
 
-static arith_t binop2(arith_t a, int op, int prec, int noeval)
+static arith_t binop2(arith_t a, int op, int precedence, int noeval)
 {
 	for (;;) {
 		union yystype val;
@@ -221,7 +221,7 @@ static arith_t binop2(arith_t a, int op, int prec, int noeval)
 		a = noeval ? b : do_binop(op, a, b);
 
 		if (op2 < ARITH_BINOP_MIN || op2 >= ARITH_BINOP_MAX ||
-		    arith_prec(op2) >= prec)
+		    arith_prec(op2) >= precedence)
 			return a;
 
 		op = op2;
diff --git a/bin/sh/arith_yylex.c b/bin/sh/arith_yylex.c
index 0d08a831ff0c..08e43a488b15 100644
--- a/bin/sh/arith_yylex.c
+++ b/bin/sh/arith_yylex.c
@@ -57,6 +57,7 @@ yylex()
 {
 	int value;
 	const char *buf = arith_buf;
+	char *end;
 	const char *p;
 
 	for (;;) {
@@ -79,7 +80,8 @@ yylex()
 		case '7':
 		case '8':
 		case '9':
-			yylval.val = strtoarith_t(buf, (char **)&arith_buf, 0);
+			yylval.val = strtoarith_t(buf, (char **)&end, 0);
+			arith_buf = end;
 			return ARITH_NUM;
 		case 'A':
 		case 'B':