diff --git a/configure b/configure
index f2d45c1305f..b703776f8b2 100755
--- a/configure
+++ b/configure
@@ -1904,7 +1904,7 @@ cc_check_clean tmp_find_type_with_size.cpp
 # for the smaller sizes.
 echo_n "Alignment required... "
 case $_host_cpu in
-	i[3-6]86 | x86_64 | ppc*)
+	i[3-6]86 | amd64 | x86_64 | ppc*)
 		# Unaligned access should work
 		_need_memalign=no
 		;;
@@ -1951,7 +1951,7 @@ case $_host_cpu in
 		echo "PowerPC"
 		DEFINES="$DEFINES -DPPC_TARGET"
 		;;
-	x86_64)
+	amd64 | x86_64)
 		echo "x86_64"
 		;;
 	*)