diff --git a/src/strings.cpp b/src/strings.cpp
--- a/src/strings.cpp
+++ b/src/strings.cpp
@@ -1892,8 +1892,6 @@ bool LanguagePackHeader::IsValid() const
 	       StrValid(this->isocode,                        lastof(this->isocode)) &&
 	       StrValid(this->number_format,                  lastof(this->number_format)) &&
 	       StrValid(this->number_abbreviations,           lastof(this->number_abbreviations)) &&
-	       StrValid(this->digit_group_separator,          lastof(this->digit_group_separator)) &&
-	       StrValid(this->digit_group_separator_currency, lastof(this->digit_group_separator_currency)) &&
 	       StrValid(this->digit_decimal_separator,        lastof(this->digit_decimal_separator));
 }