diff --git a/socat-server.sh b/socat-server.sh
index 890920d..5b2731f 100755
--- a/socat-server.sh
+++ b/socat-server.sh
@@ -1,4 +1,4 @@
 #!/bin/bash
-XDG_OPEN_LISTENER_PORT-6969
+XDG_OPEN_LISTENER_PORT=6969
 
 socat TCP-LISTEN:$XDG_OPEN_LISTENER_PORT,fork EXEC:"xargs -n 1 xdg-open"