diff --git a/arch/xtensa/src/esp32/esp32_himem.c b/arch/xtensa/src/esp32/esp32_himem.c
index c8c398a048..618b5d0020 100644
--- a/arch/xtensa/src/esp32/esp32_himem.c
+++ b/arch/xtensa/src/esp32/esp32_himem.c
@@ -70,7 +70,7 @@
 
 /* How many 32KB pages will be reserved for bank switch */
 
-#if CONFIG_ESP32_SPIRAM_BANKSWITCH_ENABLE
+#ifdef CONFIG_ESP32_SPIRAM_BANKSWITCH_ENABLE
 #  define SPIRAM_BANKSWITCH_RESERVE CONFIG_SPIRAM_BANKSWITCH_RESERVE
 #else
 #  define SPIRAM_BANKSWITCH_RESERVE 0
diff --git a/boards/xtensa/esp32/esp32-core/configs/psram/defconfig b/boards/xtensa/esp32/esp32-core/configs/psram/defconfig
index a19ba54570..bf050e8b51 100644
--- a/boards/xtensa/esp32/esp32-core/configs/psram/defconfig
+++ b/boards/xtensa/esp32/esp32-core/configs/psram/defconfig
@@ -35,7 +35,7 @@ CONFIG_HEAP2_SIZE=4194304
 CONFIG_IDLETHREAD_STACKSIZE=3072
 CONFIG_INTELHEX_BINARY=y
 CONFIG_MAX_TASKS=16
-CONFIG_MM_REGIONS=2
+CONFIG_MM_REGIONS=3
 CONFIG_NETDB_DNSCLIENT=y
 CONFIG_NETDB_DNSSERVER_IPv4ADDR=0x08080808
 CONFIG_NETDB_HOSTFILE=y