diff --git a/components/esp32/include/soc/soc.h b/components/esp32/include/soc/soc.h
index cb3d5154aa..d542efe28e 100755
--- a/components/esp32/include/soc/soc.h
+++ b/components/esp32/include/soc/soc.h
@@ -89,7 +89,7 @@
 #define  APB_CLK_FREQ_ROM                            13*1000000
 #define  CPU_CLK_FREQ_ROM                            APB_CLK_FREQ_ROM
 #define  CPU_CLK_FREQ                                APB_CLK_FREQ
-#define  APB_CLK_FREQ                                40*1000000       //unit: Hz
+#define  APB_CLK_FREQ                                80*1000000       //unit: Hz
 #define  UART_CLK_FREQ                               APB_CLK_FREQ
 //#define  WDT_CLK_FREQ                                APB_CLK_FREQ
 #define  TIMER_CLK_FREQ                              (80000000>>4) //80MHz divided by 16