diff --git a/configure.ac b/configure.ac
index 20a29f5..e995488 100644
--- a/configure.ac
+++ b/configure.ac
@@ -13,6 +13,8 @@ AC_HEADER_STDC
 AC_C_BIGENDIAN([AC_DEFINE(B_ENDIAN)], [AC_DEFINE(L_ENDIAN)])
 AC_PATH_XTRA
 
+AC_PATH_PROG(PKG_CONFIG, pkg-config)
+
 AC_SEARCH_LIBS(socket, socket)
 AC_SEARCH_LIBS(inet_aton, resolv)