diff --git a/kernel/kernel_config-4.9.x b/kernel/kernel_config-4.9.x
index 9491eb955..e5991b2ed 100644
--- a/kernel/kernel_config-4.9.x
+++ b/kernel/kernel_config-4.9.x
@@ -3380,7 +3380,7 @@ CONFIG_DEBUG_INFO_SPLIT=y
 # CONFIG_DEBUG_INFO_DWARF4 is not set
 # CONFIG_GDB_SCRIPTS is not set
 # CONFIG_ENABLE_WARN_DEPRECATED is not set
-# CONFIG_ENABLE_MUST_CHECK is not set
+CONFIG_ENABLE_MUST_CHECK=y
 CONFIG_FRAME_WARN=1024
 # CONFIG_STRIP_ASM_SYMS is not set
 # CONFIG_READABLE_ASM is not set
diff --git a/kernel/kernel_config-4.9.x-aarch64 b/kernel/kernel_config-4.9.x-aarch64
index 173cca391..fe1d7eaee 100644
--- a/kernel/kernel_config-4.9.x-aarch64
+++ b/kernel/kernel_config-4.9.x-aarch64
@@ -3464,7 +3464,7 @@ CONFIG_DEBUG_INFO_SPLIT=y
 # CONFIG_DEBUG_INFO_DWARF4 is not set
 # CONFIG_GDB_SCRIPTS is not set
 # CONFIG_ENABLE_WARN_DEPRECATED is not set
-# CONFIG_ENABLE_MUST_CHECK is not set
+CONFIG_ENABLE_MUST_CHECK=y
 CONFIG_FRAME_WARN=1024
 # CONFIG_STRIP_ASM_SYMS is not set
 # CONFIG_READABLE_ASM is not set