diff --git a/apps/sim/blocks/blocks/onedrive.ts b/apps/sim/blocks/blocks/onedrive.ts
index 9751a05964..cb602d8ec4 100644
--- a/apps/sim/blocks/blocks/onedrive.ts
+++ b/apps/sim/blocks/blocks/onedrive.ts
@@ -351,11 +351,19 @@ export const OneDriveBlock: BlockConfig<OneDriveResponse> = {
       params: (params) => {
         const { credential, folderId, fileId, mimeType, values, downloadFileName, ...rest } = params
 
+        // Handle values - could be string (from UI) or already parsed (from variable reference)
         let parsedValues
-        try {
-          parsedValues = values ? JSON.parse(values as string) : undefined
-        } catch (error) {
-          throw new Error('Invalid JSON format for values')
+        if (values) {
+          if (typeof values === 'string') {
+            try {
+              parsedValues = JSON.parse(values)
+            } catch (error) {
+              throw new Error('Invalid JSON format for values')
+            }
+          } else {
+            // Already an object/array from variable reference
+            parsedValues = values
+          }
         }
 
         return {