diff --git a/boards/xtensa/esp32/esp32-devkitc/configs/psram/defconfig b/boards/xtensa/esp32/esp32-devkitc/configs/psram/defconfig
index 9425a67ebbf..51e25761cc8 100644
--- a/boards/xtensa/esp32/esp32-devkitc/configs/psram/defconfig
+++ b/boards/xtensa/esp32/esp32-devkitc/configs/psram/defconfig
@@ -40,7 +40,7 @@ CONFIG_IOB_NCHAINS=36
 CONFIG_IOB_THROTTLE=8
 CONFIG_LINE_MAX=64
 CONFIG_MM_IOB=y
-CONFIG_MM_REGIONS=5
+CONFIG_MM_REGIONS=6
 CONFIG_NSH_BUILTIN_APPS=y
 CONFIG_NSH_FILEIOSIZE=512
 CONFIG_NSH_READLINE=y