1 files changed, 2 insertions, 0 deletions

diff --git a/bitmap.tcl b/bitmap.tcl
index 5641da6..a415e14 100644
--- a/bitmap.tcl
+++ b/bitmap.tcl
@@ -1,3 +1,5 @@
+package require Tclpd 0.2.1
+
 source pdlib.tcl
 
 set ::script_path [file dirname [info script]]