diff --git a/nuttx-configs/px4fmu-v5/nsh/defconfig b/nuttx-configs/px4fmu-v5/nsh/defconfig
index 513965b12418..6382ba13c482 100644
--- a/nuttx-configs/px4fmu-v5/nsh/defconfig
+++ b/nuttx-configs/px4fmu-v5/nsh/defconfig
@@ -1028,7 +1028,7 @@ CONFIG_FS_PROCFS_REGISTER=y
 # Memory Management
 #
 # CONFIG_MM_SMALL is not set
-CONFIG_MM_REGIONS=2
+CONFIG_MM_REGIONS=3
 # CONFIG_ARCH_HAVE_HEAP2 is not set
 CONFIG_GRAN=y
 # CONFIG_GRAN_SINGLE is not set