diff --git a/xfa/fgas/crt/cfgas_stringformatter.cpp b/xfa/fgas/crt/cfgas_stringformatter.cpp
index fff66e0..156d068 100644
--- a/xfa/fgas/crt/cfgas_stringformatter.cpp
+++ b/xfa/fgas/crt/cfgas_stringformatter.cpp
@@ -859,7 +859,7 @@
       WideString wsCategory(m_spPattern[ccf]);
       ccf++;
       while (true) {
-        if (ccf == m_spPattern.size())
+        if (ccf >= m_spPattern.size())
           return eCategory;
         if (m_spPattern[ccf] == '.' || m_spPattern[ccf] == '(')
           break;
@@ -870,7 +870,6 @@
         wsCategory += m_spPattern[ccf];
         ccf++;
       }
-
       uint32_t dwHash = FX_HashCode_GetW(wsCategory.AsStringView(), false);
       if (dwHash == FX_LOCALECATEGORY_DateTimeHash)
         return FX_LOCALECATEGORY_DateTime;