diff --git a/accel-pppd/extra/net-snmp/agent.c b/accel-pppd/extra/net-snmp/agent.c
index cfeb763927f0f28552ba48fbc89452f8c9c1a19c..9f8b1a74af4fbdf47d42459c87be33d7f1988e75 100644
--- a/accel-pppd/extra/net-snmp/agent.c
+++ b/accel-pppd/extra/net-snmp/agent.c
@@ -1,5 +1,8 @@
+#include <errno.h>
 #include <pthread.h>
+#include <sched.h>
 #include <signal.h>
+#include <string.h>
 
 #include <net-snmp/net-snmp-config.h>
 #include <net-snmp/net-snmp-includes.h>
@@ -80,6 +83,14 @@ static void *snmp_thread(void *a)
 	sigdelset(&set, 32);
 	pthread_sigmask(SIG_BLOCK, &set, NULL);
 
+	if (unshare(CLONE_FILES) < 0) {
+		log_error("net-snmp: impossible to start SNMP thread:"
+			  " unshare(CLONE_FILES) failed (%s)\n",
+			  strerror(errno));
+
+		return NULL;
+	}
+
 	snmp_register_callback(SNMP_CALLBACK_LIBRARY, SNMP_CALLBACK_LOGGING, agent_log, NULL);
   snmp_disable_log();
 	snmp_enable_calllog();