1 files changed, 3 insertions, 2 deletions

diff --git a/src/firejail/util.c b/src/firejail/util.c
index 95409129a..29eb101fb 100644
--- a/src/firejail/util.c
+++ b/src/firejail/util.c
@@ -391,7 +391,8 @@ void extract_command_name(const char *str) {
 
 
 void update_map(char *mapping, char *map_file) {
-        int fd, j;
+        int fd;
+        size_t j;
         size_t map_len;                           /* Length of 'mapping' */
 
         /* Replace commas in mapping string with newlines */
@@ -407,7 +408,7 @@ void update_map(char *mapping, char *map_file) {
                 exit(EXIT_FAILURE);
         }
 
-        if (write(fd, mapping, map_len) != map_len) {
+        if (write(fd, mapping, map_len) != (ssize_t)map_len) {
                 fprintf(stderr, "Error: cannot write to %s: %s\n", map_file, strerror(errno));
                 exit(EXIT_FAILURE);
         }