diff --git a/configs/sama5d4-ek/knsh/defconfig b/configs/sama5d4-ek/knsh/defconfig
index 37daf0d0cf9..6c933b3670e 100644
--- a/configs/sama5d4-ek/knsh/defconfig
+++ b/configs/sama5d4-ek/knsh/defconfig
@@ -455,7 +455,7 @@ CONFIG_USERMAIN_STACKSIZE=2048
 CONFIG_PTHREAD_STACK_MIN=256
 CONFIG_PTHREAD_STACK_DEFAULT=2048
 CONFIG_LIB_SYSCALL=y
-CONFIG_SYS_RESERVED=5
+CONFIG_SYS_RESERVED=6
 CONFIG_SYS_NNEST=2
 
 #
diff --git a/configs/sama5d4-ek/knsh/defconfig.ROMFS b/configs/sama5d4-ek/knsh/defconfig.ROMFS
index d52473f33d3..0252ea21c85 100644
--- a/configs/sama5d4-ek/knsh/defconfig.ROMFS
+++ b/configs/sama5d4-ek/knsh/defconfig.ROMFS
@@ -438,7 +438,7 @@ CONFIG_USERMAIN_STACKSIZE=2048
 CONFIG_PTHREAD_STACK_MIN=256
 CONFIG_PTHREAD_STACK_DEFAULT=2048
 CONFIG_LIB_SYSCALL=y
-CONFIG_SYS_RESERVED=5
+CONFIG_SYS_RESERVED=6
 CONFIG_SYS_NNEST=2
 
 #