diff --git a/src/ripple/app/hook/impl/applyHook.cpp b/src/ripple/app/hook/impl/applyHook.cpp
index 741775af3..145d5f090 100644
--- a/src/ripple/app/hook/impl/applyHook.cpp
+++ b/src/ripple/app/hook/impl/applyHook.cpp
@@ -6599,6 +6599,7 @@ __sto_emplace(
     {
         size_t len = end - inject_end;
         memcpy(write_ptr + bytes_written, inject_end, len);
+        bytes_written += len;
     }
 
     out.resize(bytes_written);