1 files changed, 1 insertions, 1 deletions

diff --git a/src/firejail/preproc.c b/src/firejail/preproc.c
index 7f602545d..1aafd1ca2 100644
--- a/src/firejail/preproc.c
+++ b/src/firejail/preproc.c
@@ -164,7 +164,7 @@ void preproc_clean_run(void) {
         int max_pids=32769;
         int start_pid = 100;
         // extract real max_pids
-        FILE *fp = fopen("/proc/sys/kernel/pid_max", "r");
+        FILE *fp = fopen("/proc/sys/kernel/pid_max", "re");
         if (fp) {
                 int val;
                 if (fscanf(fp, "%d", &val) == 1) {