diff --git a/configure.ac b/configure.ac
index c751b66..d4ec0c2 100644
--- a/configure.ac
+++ b/configure.ac
@@ -164,6 +164,7 @@ ACX_CHECK_PROGS_REQ([wget], [wget])
 ACX_CHECK_PROGS_REQ([tar], [tar])
 ACX_CHECK_PROGS_REQ([gzip], [gzip])
 ACX_CHECK_PROGS_REQ([bzip2], [bzip2])
+ACX_CHECK_PROGS_REQ([unzip], [unzip])
 ACX_CHECK_PROGS_REQ([help2man], [help2man])
 ACX_CHECK_PROGS_REQ([rsync], [rsync])