diff --git a/README.adoc b/README.adoc
index 328ac30..493c709 100644
--- a/README.adoc
+++ b/README.adoc
@@ -1512,7 +1512,7 @@ $ make test
 
 $ export BINBO_UCI_ENGINE_PATH="/path/to/engine"
 $ export BINBO_UCI_ENGINE_HOST=localhost
-$ export BINBO_UCI_ENGINE_HOST=9010
+$ export BINBO_UCI_ENGINE_PORT=9010
 $ make test
 ----
 
@@ -1522,7 +1522,7 @@ $ rebar3 ct --verbose
 
 $ export BINBO_UCI_ENGINE_PATH="/path/to/engine"
 $ export BINBO_UCI_ENGINE_HOST=localhost
-$ export BINBO_UCI_ENGINE_HOST=9010
+$ export BINBO_UCI_ENGINE_PORT=9010
 $ rebar3 ct --verbose
 ----