diff --git a/docs/manual/adding-packages-cmake.txt b/docs/manual/adding-packages-cmake.txt
index 00974d30d8..73f0943024 100644
--- a/docs/manual/adding-packages-cmake.txt
+++ b/docs/manual/adding-packages-cmake.txt
@@ -126,6 +126,11 @@ typical packages will therefore only use a few of them.
   in the build step. These are passed after the +make+ command. By
   default, empty.
 
+* +LIBFOO_INSTALL_OPTS+ contains the make options used to
+  install the package to the host directory. By default, the value
+  is +install+, which is correct for most CMake packages. It is still
+  possible to override it.
+
 * +LIBFOO_INSTALL_STAGING_OPTS+ contains the make options used to
   install the package to the staging directory. By default, the value
   is +DESTDIR=$(STAGING_DIR) install/fast+, which is correct for most