diff --git a/bin/zcat b/bin/zcat
index 715d4842..7ccecf07 100755
--- a/bin/zcat
+++ b/bin/zcat
@@ -16,7 +16,8 @@ with gzip.open("$1", "rt") as f:
 EOF
    fi
 else
-   command=$(which -a zcat | grep -v 'qp2/bin/' | head -1)
+   SCRIPTPATH="$( cd -- "$(dirname "$0")" >/dev/null 2>&1 ; pwd -P )"
+   command=$(which -a zcat | grep -v "$SCRIPTPATH/" | head -1)
    exec $command $@
 fi