diff --git a/nlsr_sync.h b/nlsr_sync.h
index 68fc767..d2fe9e5 100644
--- a/nlsr_sync.h
+++ b/nlsr_sync.h
@@ -1,7 +1,7 @@
 #ifndef _NLSR_SYNC_H_
 #define _NLSR_SYNC_H_
 
-void sync_monitor(char *topo_prefix, char *slice_prefix);
+int sync_monitor(char *topo_prefix, char *slice_prefix);
 int write_data_to_repo(char *data,char *name_prefix);
 int create_sync_slice(char *topo_prefix, char *slice_prefix);
 void get_host_name_from_command_string(struct name_prefix *name_part,char *nbr_name_uri, int offset);