diff --git a/meta/conf/documentation.conf b/meta/conf/documentation.conf
index 72513296e2..453190f024 100644
--- a/meta/conf/documentation.conf
+++ b/meta/conf/documentation.conf
@@ -282,6 +282,7 @@ MAINTAINER[doc] = "The email address of the distribution maintainer."
 MIRRORS[doc] = "Specifies additional paths from which the OpenEmbedded build system gets source code."
 MLPREFIX[doc] = "Specifies a prefix has been added to PN to create a special version of a recipe or package, such as a Multilib version."
 MODULE_TARBALL_DEPLOY[doc] = "Controls creation of the modules-*.tgz file. Set this variable to "0" to disable creation of this file, which contains all of the kernel modules resulting from a kernel build."
+MOD_INSTALL_PREFIX[doc] = "When a recipe inherits the module class, this variable specifies the directory to which kernel modules are installed on target."
 MULTIMACH_TARGET_SYS[doc] = "Separates files for different machines such that you can build for multiple target machines using the same output directories."
 
 #N