diff --git a/lib/libperf_counter_gcc.a b/lib/libperf_counter_gcc.a
index 50b7f85..f22e5fd 100644
Binary files a/lib/libperf_counter_gcc.a and b/lib/libperf_counter_gcc.a differ
diff --git a/lib/perf_counter.lib b/lib/perf_counter.lib
index 9c8f107..7c88738 100644
Binary files a/lib/perf_counter.lib and b/lib/perf_counter.lib differ
diff --git a/perf_counter.c b/perf_counter.c
index 9b297e9..1b0232b 100644
--- a/perf_counter.c
+++ b/perf_counter.c
@@ -215,6 +215,11 @@ void update_perf_counter(void)
 {
     s_nUSUnit = SystemCoreClock / 1000000ul;
     s_nMSUnit = SystemCoreClock / 1000ul;
+    
+    __IRQ_SAFE {
+        g_lLastTimeStamp = get_system_ticks();
+        g_nOffset = get_system_ticks() - g_lLastTimeStamp;
+    }
 }