diff --git a/src/main.c b/src/main.c
index c972b0c..028de5a 100644
--- a/src/main.c
+++ b/src/main.c
@@ -1,6 +1,8 @@
 #include <stdlib.h>
 #include <stdio.h>
+#include <errno.h>
 
+#include <time.h>
 #include <sys/time.h>
 
 #include "config.h"
@@ -8,10 +10,16 @@
 #include "gui.h"
 #include "display.h"
 
+static long long time_in_useconds( void )
+{
+    struct timespec ts;
+    timespec_get( &ts, TIME_UTC );
+    return ( long long )ts.tv_sec * 1000000000 + ts.tv_nsec;
+}
+
 long long time_in_mseconds( void )
 {
     struct timeval tv;
-
     gettimeofday( &tv, NULL );
     return ( ( ( long long )tv.tv_sec ) * 1000 ) + ( tv.tv_usec / 1000 );
 }
@@ -20,7 +28,7 @@ long long currentTime;
 
 // gui_update
 long long lastTime_gui_update = 0;
-long long delay_gui_update = 16;
+long long delay_gui_update = 16; // 15625;
 
 int main( int argc, char* argv[] )
 {