diff --git a/novnc/up b/novnc/up
index d61f15f..c68ef6b 100755
--- a/novnc/up
+++ b/novnc/up
@@ -20,11 +20,11 @@ do
             detach="--detach"
             ;;
         590[0-9] )
-            envar="MYVNC_NOVNC_VNCSSH_PORT=${1}"
+            export MYVNC_NOVNC_VNCSSH_PORT=${1}
             ;;
     esac
     shift
 done
 
 # Compose up
-${envar} docker compose up ${build} ${detach}
+docker compose up ${build} ${detach}