diff --git a/examples/wifi/iperf/sdkconfig.defaults.esp32 b/examples/wifi/iperf/sdkconfig.defaults.esp32
index b6947c7a21..34c6b6f280 100644
--- a/examples/wifi/iperf/sdkconfig.defaults.esp32
+++ b/examples/wifi/iperf/sdkconfig.defaults.esp32
@@ -16,7 +16,7 @@ CONFIG_LWIP_UDP_RECVMBOX_SIZE=64
 CONFIG_LWIP_TCPIP_RECVMBOX_SIZE=64
 
 CONFIG_ESPTOOLPY_FLASHMODE_QIO=y
-CONFIG_ESPTOOLPY_FLASHFREQ_40M=y
+CONFIG_ESPTOOLPY_FLASHFREQ_80M=y
 
 CONFIG_ESP_DEFAULT_CPU_FREQ_MHZ_240=y
 CONFIG_ESP_DEFAULT_CPU_FREQ_MHZ=240