diff --git a/configure.in b/configure.in
index 67e953f3eae361c4347b8143cb5624403eb17f80..13c31a29d4a995f4267ab2b2281f3e69d359eda3 100644
--- a/configure.in
+++ b/configure.in
@@ -12,7 +12,7 @@ AC_DEFINE_UNQUOTED(PIGEONHOLE_NAME, "$PACKAGE_NAME",
 AC_DEFINE_UNQUOTED(PIGEONHOLE_VERSION, "$PACKAGE_VERSION", 
 	[Define to the version of Pigeonhole for Dovecot.])
 
-AM_INIT_AUTOMAKE([no-define foreign])
+AM_INIT_AUTOMAKE([no-define foreign tar-ustar])
 
 AM_MAINTAINER_MODE