diff --git a/toolchain/gcc/patches/3.4.6/200-uclibc-locale.patch b/toolchain/gcc/patches/3.4.6/200-uclibc-locale.patch
index 3fc4900b0..26cf90624 100644
--- a/toolchain/gcc/patches/3.4.6/200-uclibc-locale.patch
+++ b/toolchain/gcc/patches/3.4.6/200-uclibc-locale.patch
@@ -3125,13 +3125,13 @@ diff -urN gcc-3.4.2-dist/libstdc++-v3/crossconfig.m4 gcc-3.4.2/libstdc++-v3/cros
 +    GLIBCXX_CHECK_WCHAR_T_SUPPORT
 +
 +    # For LFS.
-+    AC_DEFINE(HAVE_INT64_T)
++    GLIBCXX_CHECK_INT64_T
 +    case "$target" in
 +      *-uclinux*)
 +        # Don't enable LFS with uClinux
 +        ;;
 +      *)
-+        AC_DEFINE(_GLIBCXX_USE_LFS)
++        GLIBCXX_USE_LFS
 +    esac
 +
 +    # For showmanyc_helper().