diff --git a/components/esp8266/lib/VERSION b/components/esp8266/lib/VERSION
index 5d436cd3..1af428fa 100644
--- a/components/esp8266/lib/VERSION
+++ b/components/esp8266/lib/VERSION
@@ -1,7 +1,7 @@
 gwen:
     crypto:     8943c89
     espnow:     8943c89
-    core:       f4f0d3d
+    core:       c875f12
     net80211:   ac9e664
     pp:         830c0c8
     pwm:        0181338
diff --git a/components/esp8266/lib/libcore.a b/components/esp8266/lib/libcore.a
index a7165fe0..c3475e32 100644
Binary files a/components/esp8266/lib/libcore.a and b/components/esp8266/lib/libcore.a differ
diff --git a/components/freertos/port/esp8266/include/freertos/xtensa_timer.h b/components/freertos/port/esp8266/include/freertos/xtensa_timer.h
index 76f87957..ff97830f 100644
--- a/components/freertos/port/esp8266/include/freertos/xtensa_timer.h
+++ b/components/freertos/port/esp8266/include/freertos/xtensa_timer.h
@@ -111,7 +111,9 @@ Adjust this frequency to taste (it's not real-time anyway!).
 #ifdef XT_XT2000    /* deprecated */
 #define XT_CLOCK_FREQ       16500000    /* 16.5 MHz (XT2000 default) */
 #else
-#define XT_CLOCK_FREQ       80000000
+//#define XT_CLOCK_FREQ       80000000
+#define XT_BOARD
+#define xtbsp_clock_freq_hz() 80000000
 #endif
 #endif /* XT_SIMULATOR */
 
diff --git a/components/freertos/port/esp8266/port.c b/components/freertos/port/esp8266/port.c
index 5aa58680..49e9dfde 100644
--- a/components/freertos/port/esp8266/port.c
+++ b/components/freertos/port/esp8266/port.c
@@ -204,6 +204,7 @@ portBASE_TYPE xPortStartScheduler(void)
     _xt_isr_unmask(1 << ETS_SOFT_INUM);
 
     /* Initialize system tick timer interrupt and schedule the first tick. */
+    _xt_tick_divisor_init();
     _xt_tick_timer_init();
 
     vTaskSwitchContext();