diff --git a/fxjs/xfa/cfxjse_formcalc_context.cpp b/fxjs/xfa/cfxjse_formcalc_context.cpp
index 99d7ca1..6f3301d 100644
--- a/fxjs/xfa/cfxjse_formcalc_context.cpp
+++ b/fxjs/xfa/cfxjse_formcalc_context.cpp
@@ -45,9 +45,9 @@
 const wchar_t kStrCode[] = L"0123456789abcdef";
 
 struct XFA_FMHtmlReserveCode {
-  uint32_t m_uCode;
+  uint16_t m_uCode;
   // Inline string data reduces size for small strings.
-  const char m_htmlReserve[12];
+  const char m_htmlReserve[10];
 };
 
 // Sorted by |m_htmlReserve|.