GUACAMOLE-1491: Merge fix environment name of GUACD_PORT
diff --git a/src/guacamole-docker.md b/src/guacamole-docker.md
index 30b9db3..a4ce1a4 100644
--- a/src/guacamole-docker.md
+++ b/src/guacamole-docker.md
@@ -146,7 +146,7 @@
: The hostname of the guacd instance to use to establish remote desktop
connections. *This is required if you are not using Docker to provide guacd.*
-`GUACD_POST`
+`GUACD_PORT`
: The port that Guacamole should use when connecting to guacd. This environment
variable is optional. If not provided, the standard guacd port of 4822 will
be used.