diff --git a/bin/ptool b/bin/ptool
index aaa9290..4a0bbc9 100755
--- a/bin/ptool
+++ b/bin/ptool
@@ -195,7 +195,7 @@ OPTIONS
         ;;
     esac
     REF_BRANCH="${ref^^}"
-    array_contains BRANCHES "$REF_BRANCH" || die "$ref: invalid branch"
+    array_contains PMAN_BRANCHES "$REF_BRANCH" || die "$ref: invalid branch"
 
 else
     REF_BRANCH="PMAN_TOOL_${MYNAME^^}"; REF_BRANCH="${!REF_BRANCH}"