diff --git a/utils/check-package b/utils/check-package
index 4c9eea0534..a5f5dc44c0 100755
--- a/utils/check-package
+++ b/utils/check-package
@@ -49,6 +49,7 @@ DO_CHECK_INTREE = re.compile("|".join([
     "arch/",
     "boot/",
     "fs/",
+    "linux/",
     "package/",
     "system/",
     ]))
diff --git a/utils/checkpackagelib/lib_mk.py b/utils/checkpackagelib/lib_mk.py
index 58de4fd3cb..9989556e95 100644
--- a/utils/checkpackagelib/lib_mk.py
+++ b/utils/checkpackagelib/lib_mk.py
@@ -160,6 +160,7 @@ class TypoInPackageVariable(_CheckFunction):
         "ACLOCAL_HOST_DIR",
         "BR_CCACHE_INITIAL_SETUP",
         "BR_NO_CHECK_HASH_FOR",
+        "LINUX_EXTENSIONS",
         "LINUX_POST_PATCH_HOOKS",
         "LINUX_TOOLS",
         "LUA_RUN",
@@ -179,6 +180,8 @@ class TypoInPackageVariable(_CheckFunction):
         package = package.replace("-", "_").upper()
         # linux tools do not use LINUX_TOOL_ prefix for variables
         package = package.replace("LINUX_TOOL_", "")
+        # linux extensions do not use LINUX_EXT_ prefix for variables
+        package = package.replace("LINUX_EXT_", "")
         self.package = package
         self.REGEX = re.compile("^(HOST_|ROOTFS_)?({}_[A-Z0-9_]+)".format(package))
         self.FIND_VIRTUAL = re.compile(