diff --git a/src/logger.c b/src/logger.c
index 73c85ca..cf379c6 100644
--- a/src/logger.c
+++ b/src/logger.c
@@ -1,3 +1,4 @@
+#include <stdio.h>
 #include <zmq.h>
 #include <assert.h>
 #include <libgen.h>
@@ -39,7 +40,7 @@ typedef struct record {
 
 typedef struct queue {
   int length;
-  int interval;
+  long interval;
   record records[RECORD_MAX];
 } queue;
 
@@ -149,13 +150,14 @@ void publish(int queue_id){
     // Build message header:
     char buffer[ZMQ_MSG_SIZE];
     sprintf(buffer,"%s\n%s\n%s\n%ld\n",ZMQ_TOKEN,__key,__client,queues[queue_id].interval);
+    printf(buffer);
     int msglen=strlen(buffer);
 
     // Put every lines in the buffer and send it
     char line[STATIC_LEN];
     for(int record=0;record<queues[queue_id].length;record++){
       *line='\0';
-      sprintf(line,"%d,%ld,%d",queues[queue_id].records[record].secs,queues[queue_id].records[record].nsecs,queues[queue_id].records[record].power);
+      sprintf(line,"%ld,%ld,%d",queues[queue_id].records[record].secs,queues[queue_id].records[record].nsecs,queues[queue_id].records[record].power);
       int linelength=strlen(line);
       if((linelength+msglen) <ZMQ_MSG_SIZE){
           strcat(buffer,line);