diff --git a/libunix/Makefile b/libunix/Makefile
index 0789970..f10b7dc 100644
--- a/libunix/Makefile
+++ b/libunix/Makefile
@@ -12,7 +12,7 @@ LIBRARY = libunix.a
 SOURCES = divsi3.S modsi3.S mulsi3.S udivsi3.S umodsi3.S free.c malloc.c \
 	  memcpy.c memset.c printf.c putchar.c puts.c read.c sprintf.c \
 	  strcpy.c strlen.c strncpy.c vsprintf.c write.c strcmp.c \
-	  strncmp.c
+	  strncmp.c strtol.c
 
 HEADERS = 
 
diff --git a/libunix/strtol.c b/libunix/strtol.c
new file mode 100644
index 0000000..f563191
--- /dev/null
+++ b/libunix/strtol.c
@@ -0,0 +1,67 @@
+#include <stdlib.h>
+
+static int my_isspace(int c)
+{
+	return (c == ' ') || (c == '\f') || (c == '\n') || 
+		(c == '\r') || (c == '\t') || (c == '\v');
+}
+
+long int __strtol_internal (const char *nptr, char **endptr, int base, int group)
+{
+	long result = 0;
+	int sign;
+
+	while(my_isspace(*nptr))
+		nptr++;
+
+	if (*nptr == '-')
+	{
+		nptr++;
+		sign = -1;
+	} else if (*nptr == '+')
+	{
+		nptr++;
+		sign = 1;
+	} else
+		sign = 1;
+
+	if (base == 0)
+	{
+		if (*nptr == '0')
+		{
+			nptr++;
+			if (*nptr == 'x')
+			{
+				base = 16;
+				nptr++;
+			} else
+				base = 8;
+		}
+		else
+			base = 10;
+	}
+
+	while (*nptr)
+	{
+		int digit;
+
+		if ( (*nptr >= '0') && (*nptr <= '9') )
+			digit = *nptr - '0';
+		else if ( (*nptr >= 'a') && (*nptr <= 'z') )
+			digit = *nptr - 'a' + 10;
+		else if ( (*nptr >= 'A') && (*nptr <= 'Z') )
+			digit = *nptr - 'A' + 10;
+		else
+			break;
+
+		if (digit >= base)
+			break;
+
+		result = (result * base) + digit;
+
+		nptr++;
+	}
+	if (endptr)
+		*endptr = (char*)nptr;
+	return sign * result;
+}