diff --git a/configure b/configure
index 17255451db0..d2e2aa903b9 100755
--- a/configure
+++ b/configure
@@ -1696,7 +1696,7 @@ case $_host_cpu in
 		define_in_config_if_yes yes 'USE_ARM_SMUSH_ASM'
 		define_in_config_if_yes yes 'USE_ARM_GFX_ASM'
 		define_in_config_if_yes yes 'USE_ARM_COSTUME_ASM'
-		
+
 		DEFINES="$DEFINES -DARM_TARGET"
 		;;
 	i[3-6]86)
@@ -1712,6 +1712,9 @@ case $_host_cpu in
 		echo "PowerPC"
 		DEFINES="$DEFINES -DPPC_TARGET"
 		;;
+	x86_64)
+		echo "x86_64"
+		;;
 	*)
 		echo "unknown ($_host_cpu)"
 		;;