diff --git a/sys/man/2/atof b/sys/man/2/atof
index cf7a88fde..885aade28 100644
--- a/sys/man/2/atof
+++ b/sys/man/2/atof
@@ -135,10 +135,3 @@ Zero is returned if the beginning of the input string is not
 interpretable as a number; even in this case,
 .I rptr
 will be updated.
-.SH BUGS
-.I Atoi,
-.I atol,
-and
-.I atoll
-accept octal and hexadecimal numbers in the style of C,
-contrary to the ANSI specification.
diff --git a/sys/src/libc/port/atol.c b/sys/src/libc/port/atol.c
index 6928da7bd..cf7270c6f 100644
--- a/sys/src/libc/port/atol.c
+++ b/sys/src/libc/port/atol.c
@@ -4,50 +4,11 @@
 long
 atol(char *s)
 {
-	long n;
-	int f, c;
-
-	n = 0;
-	f = 0;
-	while(*s == ' ' || *s == '\t')
-		s++;
-	if(*s == '-' || *s == '+') {
-		if(*s++ == '-')
-			f = 1;
-		while(*s == ' ' || *s == '\t')
-			s++;
-	}
-	if(s[0]=='0' && s[1]) {
-		if(s[1]=='x' || s[1]=='X'){
-			s += 2;
-			for(;;) {
-				c = *s;
-				if(c >= '0' && c <= '9')
-					n = n*16 + c - '0';
-				else
-				if(c >= 'a' && c <= 'f')
-					n = n*16 + c - 'a' + 10;
-				else
-				if(c >= 'A' && c <= 'F')
-					n = n*16 + c - 'A' + 10;
-				else
-					break;
-				s++;
-			}
-		} else
-			while(*s >= '0' && *s <= '7')
-				n = n*8 + *s++ - '0';
-	} else
-		while(*s >= '0' && *s <= '9')
-			n = n*10 + *s++ - '0';
-	if(f)
-		n = -n;
-	return n;
+	return strtol(s, nil, 10);
 }
 
 int
 atoi(char *s)
 {
-
-	return atol(s);
+	return strtol(s, nil, 10);
 }
diff --git a/sys/src/libc/port/atoll.c b/sys/src/libc/port/atoll.c
index b4497de59..d4d794248 100644
--- a/sys/src/libc/port/atoll.c
+++ b/sys/src/libc/port/atoll.c
@@ -4,5 +4,5 @@
 vlong
 atoll(char *s)
 {
-	return strtoll(s, nil, 0);
+	return strtoll(s, nil, 10);
 }