diff --git a/src/network/bpf/sysctl_monitor/sysctl-monitor.bpf.c b/src/network/bpf/sysctl_monitor/sysctl-monitor.bpf.c
index e0ec8489d2..38183605a2 100644
--- a/src/network/bpf/sysctl_monitor/sysctl-monitor.bpf.c
+++ b/src/network/bpf/sysctl_monitor/sysctl-monitor.bpf.c
@@ -33,7 +33,7 @@ struct str {
         size_t l;
 };
 
-static long cut_last(u32 i, struct str *str) {
+static long cut_last(u64 i, struct str *str) {
         char *s;
 
         /* Sanity check for the preverifier */