diff --git a/toolchain/helpers.mk b/toolchain/helpers.mk
index 6875916..9595196 100644
--- a/toolchain/helpers.mk
+++ b/toolchain/helpers.mk
@@ -166,7 +166,7 @@
 # Check the specified kernel headers version actually matches the
 # version in the toolchain.
 #
-# $1: cross-gcc path
+# $1: sysroot directory
 # $2: kernel version string, in the form: X.Y
 #
 check_kernel_headers_version = \