--- ../ghc-6.10.4-boot/configure.orig
+++ ../ghc-6.10.4-boot/configure
@@ -1989,6 +1989,8 @@
         TargetPlatform=x86_64-unknown-linux;;
 x86_64-*-freebsd*)
 	TargetPlatform=x86_64-unknown-freebsd;;
+amd64-*-freebsd*)
+	TargetPlatform=x86_64-unknown-freebsd;;
 x86_64-*-openbsd*)
 	TargetPlatform=x86_64-unknown-openbsd;;
 x86_64-*-netbsd*)