1 files changed, 2 insertions, 2 deletions

diff --git a/src/firejail/sandbox.c b/src/firejail/sandbox.c
index 66881c040..2c28aa24b 100644
--- a/src/firejail/sandbox.c
+++ b/src/firejail/sandbox.c
@@ -250,7 +250,7 @@ static int monitor_application(pid_t app_pid) {
                 }
                 while(rv != monitored_pid);
                 if (arg_debug)
-                        printf("Sandbox monitor: waitpid %u retval %d status %d\n", monitored_pid, rv, status);
+                        printf("Sandbox monitor: waitpid %d retval %d status %d\n", monitored_pid, rv, status);
                 if (rv == -1) { // we can get here if we have processes joining the sandbox (ECHILD)
                         if (arg_debug)
                                 perror("waitpid");
@@ -294,7 +294,7 @@ static int monitor_application(pid_t app_pid) {
                 closedir(dir);
 
                 if (monitored_pid != 0 && arg_debug)
-                        printf("Sandbox monitor: monitoring %u\n", monitored_pid);
+                        printf("Sandbox monitor: monitoring %d\n", monitored_pid);
         }
 
         // return the latest exit status.