diff --git a/ports/espressif/boards/m5stack_atom_u/sdkconfig b/ports/espressif/boards/m5stack_atom_u/sdkconfig
index 7f405b00e0..90c99459a8 100644
--- a/ports/espressif/boards/m5stack_atom_u/sdkconfig
+++ b/ports/espressif/boards/m5stack_atom_u/sdkconfig
@@ -1,4 +1,3 @@
-CONFIG_ESP32_ECO3_CACHE_LOCK_FIX=y
 CONFIG_ESP32_SPIRAM_SUPPORT=n
 
 # CONFIG_SPIRAM_ALLOW_BSS_SEG_EXTERNAL_MEMORY is not set