diff --git a/configure.ac b/configure.ac
index a02a76b2a..b885bd91b 100644
--- a/configure.ac
+++ b/configure.ac
@@ -2095,18 +2095,11 @@ AC_GCC_WARNING_SUBST_NO([unused-function], [FLAG_W_NO_UNUSED_FUNCTION])
 AC_GCC_WARNING_SUBST_NO([static-local-in-inline], [FLAG_W_NO_STATIC_LOCAL_IN_INLINE])
 AC_GCC_WARNING_SUBST_NO([mismatched-new-delete], [FLAG_W_NO_MISMATCHED_NEW_DELETE])
 AC_GCC_WARNING_SUBST_NO([infinite-recursion], [FLAG_W_NO_INFINITE_RECURSION])
+
 AC_GCC_WARNING_SUBST([write-strings], [FLAG_W_WRITE_STRINGS])
 AC_GCC_WARNING_SUBST([empty-body], [FLAG_W_EMPTY_BODY])
 AC_GCC_WARNING_SUBST([format], [FLAG_W_FORMAT])
-# Disabled for now until all platforms are clean
-format_checking_enabled=no
-#format_checking_enabled=yes
-if test "$format_checking_enabled" = "yes"; then
-   AC_GCC_WARNING_SUBST([format-signedness], [FLAG_W_FORMAT_SIGNEDNESS])
-else
-   dumy_assignment_to_avoid_syntax_errors=1
-   AC_SUBST([FLAG_W_FORMAT_SIGNEDNESS], [])
-fi
+AC_GCC_WARNING_SUBST([format-signedness], [FLAG_W_FORMAT_SIGNEDNESS])
 AC_GCC_WARNING_SUBST([cast-qual], [FLAG_W_CAST_QUAL])
 AC_GCC_WARNING_SUBST([old-style-declaration], [FLAG_W_OLD_STYLE_DECLARATION])
 AC_GCC_WARNING_SUBST([ignored-qualifiers], [FLAG_W_IGNORED_QUALIFIERS])