diff --git a/bin/wg_cmd b/bin/wg_cmd
index 23d479b..e800c97 100755
--- a/bin/wg_cmd
+++ b/bin/wg_cmd
@@ -1,6 +1,6 @@
 #!/bin/bash
 
-WGAS_SUDO=${-:false}
+WGAS_SUDO=${:-false}
 
 if [[ $WGAS_SUDO == "true" ]]; then
   sudo wg "$@"