diff --git a/docs/manual/adding-packages-directory.txt b/docs/manual/adding-packages-directory.txt
index c2f0a1a848..93e6a3ef19 100644
--- a/docs/manual/adding-packages-directory.txt
+++ b/docs/manual/adding-packages-directory.txt
@@ -222,8 +222,8 @@ use in the comment.
 * Kernel headers
 ** Dependency symbol: +BR2_TOOLCHAIN_HEADERS_AT_LEAST_X_Y+, (replace
    +X_Y+ with the proper version, see +toolchain/toolchain-common.in+)
-** Comment string: +headers >= X.Y+ (replace +X.Y+ with the
-   proper version)
+** Comment string: +headers >= X.Y+ and/or `headers <= X.Y` (replace
+   +X.Y+ with the proper version)
 
 * C library
 ** Dependency symbol: +BR2_TOOLCHAIN_USES_GLIBC+,