diff --git a/src/mode/fdm/prepare.js b/src/mode/fdm/prepare.js
index 8db5507c..32db121e 100644
--- a/src/mode/fdm/prepare.js
+++ b/src/mode/fdm/prepare.js
@@ -267,7 +267,7 @@
 
         // generate purge block for given nozzle
         function purge(nozzle, track, layer, start, z, using) {
-            if (extcount < 2) {
+            if (extcount < 2 || isBelt) {
                 return start;
             }
             let rec = track[nozzle];