diff --git a/tools/automake/Makefile b/tools/automake/Makefile
index bf1d2764b..c30a9900e 100644
--- a/tools/automake/Makefile
+++ b/tools/automake/Makefile
@@ -1,5 +1,5 @@
 #
-# Copyright (C) 2006 OpenWrt.org
+# Copyright (C) 2006-2012 OpenWrt.org
 #
 # This is free software, licensed under the GNU General Public License v2.
 # See /LICENSE for more information.
@@ -16,6 +16,7 @@ PKG_MD5SUM:=c2972c4d9b3e29c03d5f2af86249876f
 include $(INCLUDE_DIR)/host-build.mk
 
 HOST_CONFIGURE_ARGS += --datarootdir=$(STAGING_DIR_HOST)/share
+HOST_CONFIGURE_VARS += am_cv_prog_PERL_ithreads=no
 
 define Host/Install
 	$(MAKE) -C $(HOST_BUILD_DIR) install