diff --git a/js/formats/ips.js b/js/formats/ips.js
index 853ad6e..f0eb603 100644
--- a/js/formats/ips.js
+++ b/js/formats/ips.js
@@ -63,8 +63,8 @@ IPS.prototype.export=function(fileName){
 	}
 
 	tempFile.writeString('EOF');
-	if(rec.truncate)
-		tempFile.writeU24(rec.truncate);
+	if(this.truncate)
+		tempFile.writeU24(this.truncate);
 
 
 	return tempFile
@@ -229,4 +229,4 @@ function createIPSFromFiles(original, modified){
 
 
 	return patch
-}
\ No newline at end of file
+}