diff --git a/src/logging.c b/src/logging.c
index 8305d70..95ad185 100644
--- a/src/logging.c
+++ b/src/logging.c
@@ -271,7 +271,7 @@ static void __ortp_logv_out(OrtpLogLevel lev, const char *fmt, va_list args){
                }
        #endif
 #endif
-       fprintf(__log_file,"%i-%.2i-%.2i %.2i:%.2i:%.2i:%.3i ortp-%s-%s" ENDLINE,1900+lt->tm_year,lt->tm_mon,lt->tm_mday,lt->tm_hour,lt->tm_min,lt->tm_sec,(int)(tp.tv_usec/1000), lname,msg);
+       fprintf(__log_file,"%i-%.2i-%.2i %.2i:%.2i:%.2i:%.3i ortp-%s-%s" ENDLINE,1900+lt->tm_year,lt->tm_mon+1,lt->tm_mday,lt->tm_hour,lt->tm_min,lt->tm_sec,(int)(tp.tv_usec/1000), lname,msg);
        fflush(__log_file);
        ortp_free(msg);
 }