diff --git a/lib/bundler/man/bundle-check.1 b/lib/bundler/man/bundle-check.1
index 08d41b7881..27c863e97f 100644
--- a/lib/bundler/man/bundle-check.1
+++ b/lib/bundler/man/bundle-check.1
@@ -9,6 +9,8 @@
 \fBcheck\fR searches the local machine for each of the gems requested in the Gemfile\. If all gems are found, Bundler prints a success message and exits with a status of 0\.
 .P
 If not, the first missing gem is listed and Bundler exits status 1\.
+.P
+If a gem in the Gemfile is installed on the local machine, but not yet listed in the lockfile, then the lockfile will be updated to include it\.
 .SH "OPTIONS"
 .TP
 \fB\-\-dry\-run\fR
diff --git a/lib/bundler/man/bundle-check.1.ronn b/lib/bundler/man/bundle-check.1.ronn
index f2846b8ff2..81e42cc5ad 100644
--- a/lib/bundler/man/bundle-check.1.ronn
+++ b/lib/bundler/man/bundle-check.1.ronn
@@ -15,6 +15,9 @@ a status of 0.
 
 If not, the first missing gem is listed and Bundler exits status 1.
 
+If a gem in the Gemfile is installed on the local machine, but not yet listed
+in the lockfile, then the lockfile will be updated to include it.
+
 ## OPTIONS
 
 * `--dry-run`: