diff --git a/boards/xtensa/esp32/esp32-devkitc/configs/tickless/defconfig b/boards/xtensa/esp32/esp32-devkitc/configs/tickless/defconfig
index 18e4ce5c048..879b568f241 100644
--- a/boards/xtensa/esp32/esp32-devkitc/configs/tickless/defconfig
+++ b/boards/xtensa/esp32/esp32-devkitc/configs/tickless/defconfig
@@ -27,7 +27,7 @@ CONFIG_HAVE_CXXINITIALIZE=y
 CONFIG_IDLETHREAD_STACKSIZE=3072
 CONFIG_INIT_ENTRYPOINT="nsh_main"
 CONFIG_INTELHEX_BINARY=y
-CONFIG_MM_REGIONS=2
+CONFIG_MM_REGIONS=3
 CONFIG_NSH_ARCHINIT=y
 CONFIG_NSH_BUILTIN_APPS=y
 CONFIG_NSH_FILEIOSIZE=512