diff --git a/common/auth.c b/common/auth.c
line changes: +3/-2
index 6e5f346..3fd0376
--- a/common/auth.c
+++ b/common/auth.c

@@ -66,7 +66,7 @@ int auth_get_password_version(const char *username) {
 	char filename[512];
 	int fd;
 	char str[4];
-	int version;
+	int len;
 
 	sprintf(filename, "%s/%s/password_version", DATA_PATH, username);
 	if (access(filename, F_OK) != 0) {

@@ -74,8 +74,9 @@ int auth_get_password_version(const char *username) {
 	}
 
 	fd = open(filename, O_RDONLY);
-	read(fd, str, 4);
+	len = read(fd, str, 4);
 	close(fd);
+	str[len] = 0;
 	/* strtol returns zero if there isn't a number */
 	return strtol(str, NULL, 10);
 }