diff --git a/web/src/reader/reader.ts b/web/src/reader/reader.ts
index 5fc5080..0ff9d53 100644
--- a/web/src/reader/reader.ts
+++ b/web/src/reader/reader.ts
@@ -562,9 +562,11 @@ document.addEventListener("alpine:init", () => {
           ? this.book?.sections?.filter((s: any) => s.linear !== "no")
               ?.length ?? 0
           : location?.total ?? 0,
-        epubcfi: cfi || "",
         reading_mode: this.readingMode || undefined,
       };
+      if (!this.isFixedLayout) {
+        body.epubcfi = cfi || "";
+      }
 
       const tocItem = this.lastRelocateDetail?.tocItem;
       if (tocItem) {