diff --git a/logger.c b/logger.c
index 380250a..834ab3e 100644
--- a/logger.c
+++ b/logger.c
@@ -22,6 +22,7 @@ struct Logger {
   char old[132];
   int period;
   time_t last;
+  long pos;
 };
 
 static char *dir = NULL;
@@ -34,6 +35,7 @@ void LoggerWrite(Logger *log, time_t now, int period, char *value) {
   int l;
   int newday;
   FILE *fil;
+  long pos;
   
   if (dir == NULL) return;
   if (now == 0) {
@@ -44,36 +46,46 @@ void LoggerWrite(Logger *log, time_t now, int period, char *value) {
   tm = localtime(&now);
   if (tm->tm_yday != yday) {
     log->period = 0;
-  } else if (0 == strncmp(value, log->old, sizeof(log->old))) {  /* value has not changed */
-    return;
   }
   log->last = now;
   snprintf(path, sizeof path, "%s/%s/", dir, log->name);
   l = strlen(path);
 
   strftime(path + l, sizeof path - l, "%m-%d.log", tm);
-  fil = fopen(path, "a+");
-  if (fil == NULL) return;
-  fseek(fil, 0, SEEK_SET);
-  fgets(buf, sizeof buf, fil);
-  
   strftime(stim, sizeof stim, "#%Y-%m-%d %H:%M:%S\n", tm);
-  if (0 != strncmp(buf, stim, 11)) {
-    fclose(fil);
-    fil=fopen(path, "w+"); /* overwrite old logfile */
+  fil = fopen(path, "r+");
+  if (fil == NULL) { /* create new file */
+    fil = fopen(path, "w+");
     if (fil == NULL) return;
     fputs(stim, fil);
-  } else {
-    fseek(fil, 0, SEEK_END); /* set position to end */
+  } else { /* check if file is actual */
+    fgets(buf, sizeof buf, fil);
+    if (0 != strncmp(buf, stim, 11)) {
+      fclose(fil);
+      fil=fopen(path, "w+"); /* overwrite old logfile */
+      if (fil == NULL) return;
+      fputs(stim, fil);
+    } else {
+      fseek(fil, 0, SEEK_END); /* set position to end */
+    }
   }
   if (period != log->period) {
     log->period = period;
     snprintf(buf, sizeof buf, "\t%d", period);
+    log->pos = 0;
   } else {
     buf[0]='\0';
   }
+  if (log->pos > 0) {
+    fseek(fil, log->pos, SEEK_SET);
+  }
+  log->pos = ftell(fil);
   strftime(stim, sizeof stim,"%H:%M:%S", tm);
   fprintf(fil, "%s\t%s%s\n", stim, value, buf);
+  if (0 != strncmp(value, log->old, sizeof(log->old)) || buf[0]!='\0') {  /* value has changed */
+    log->pos = ftell(fil); /* next time append to the end */
+  }
+
   l = strlen(value);
   if (l >= sizeof(log->old)) {
     l = sizeof(log->old) - 1;
@@ -126,6 +138,7 @@ Logger *LoggerMake(char *name, int period) {
   log->period = 0;
   log->old[0] = '\0';
   log->last = 0;
+  log->pos = 0;
   LoggerWrite(log, time(NULL) - 1, period, "");
   return log;
 }