diff --git a/meta/conf/documentation.conf b/meta/conf/documentation.conf
index 72513296e2..93949c7ff8 100644
--- a/meta/conf/documentation.conf
+++ b/meta/conf/documentation.conf
@@ -239,6 +239,7 @@ KERNEL_FEATURES[doc] = "Includes additional metadata from the Yocto Project kern
 KERNEL_IMAGETYPE[doc] = "The type of kernel to build for a device, usually set by the machine configuration files and defaults to 'zImage'."
 KERNEL_IMAGETYPES[doc] = "The list of types of kernel to build for a device, usually set by the machine configuration files and defaults to KERNEL_IMAGETYPE."
 KERNEL_MODULE_AUTOLOAD[doc] = "Lists kernel modules that need to be auto-loaded during boot"
+KERNEL_MODULE_INSTALL_PREFIX[doc] = "When a recipe inherits the module class, this variable specifies the directory to which kernel modules are installed on target."
 KERNEL_MODULE_PROBECONF[doc] = "Lists kernel modules for which the build system expects to find module_conf_* values that specify configuration for each of the modules"
 KERNEL_PACKAGE_NAME[doc] = "Name prefix for kernel packages. Defaults to 'kernel'."
 KERNEL_PATH[doc] = "The location of the kernel sources. This variable is set to the value of the STAGING_KERNEL_DIR within the module class (module.bbclass)."