diff --git a/rapids/templates/rapids/question_display_block.html b/rapids/templates/rapids/question_display_block.html
index 31940ca9..f3b3e8ab 100755
--- a/rapids/templates/rapids/question_display_block.html
+++ b/rapids/templates/rapids/question_display_block.html
@@ -112,7 +112,7 @@
             let images = document.getElementById("single-dicom-viewer").dataset.images;
 
             let lson_toolstates = [];
-            for (cost image in images) {
+            for (const image of images) {
                 json_toolstates.push(JSON.stringify(toolstate[image]));
             }