diff --git a/bin/rbenv-install b/bin/rbenv-install
index 45aa815b..da7f9328 100755
--- a/bin/rbenv-install
+++ b/bin/rbenv-install
@@ -5,6 +5,7 @@
 # Usage: rbenv install [-f|-s] [-kpv] <version>
 #        rbenv install [-f|-s] [-kpv] <definition-file>
 #        rbenv install -l|--list
+#        rbenv install --version
 #
 #   -l/--list          List all available versions
 #   -f/--force         Install even if the version appears to be installed already
@@ -16,6 +17,7 @@
 #                      (defaults to $RBENV_ROOT/sources)
 #   -p/--patch         Apply a patch from stdin before building
 #   -v/--verbose       Verbose mode: print compilation status to stdout
+#   --version          Show version of ruby-build
 #
 # For detailed information on installing Ruby versions with
 # ruby-build, including a list of environment variables for adjusting
diff --git a/bin/ruby-build b/bin/ruby-build
index e3a88dde..59b43a40 100755
--- a/bin/ruby-build
+++ b/bin/ruby-build
@@ -2,6 +2,7 @@
 #
 # Usage: ruby-build [-kpv] <definition> <prefix>
 #        ruby-build --definitions
+#        ruby-build --version
 #
 #   -k/--keep        Do not remove source tree after installation
 #   -p/--patch       Apply a patch from stdin before building
@@ -9,6 +10,7 @@
 #   -4/--ipv4        Resolve names to IPv4 addresses only
 #   -6/--ipv6        Resolve names to IPv6 addresses only
 #   --definitions    List all built-in definitions
+#   --version        Show version of ruby-build
 #
 
 RUBY_BUILD_VERSION="20160111"