diff --git a/pbc b/pbc
index 18109cf..6887e9a 100755
--- a/pbc
+++ b/pbc
@@ -1,7 +1,7 @@
 #!/usr/bin/env bash
 
 function usage() {
-  full=${1:-false}
+  local full=${1:-false}
   cat <<EOF
 Usage: $SCRIPT [-h] [-H] [-c config] command [OPTIONS]