diff --git a/configure.ac b/configure.ac
index ab867871..efdbe4de 100644
--- a/configure.ac
+++ b/configure.ac
@@ -30,6 +30,7 @@ XORG_ENABLE_SPECS
 XORG_WITH_XMLTO(0.0.20)
 XORG_WITH_FOP
 XORG_CHECK_SGML_DOCTOOLS(1.5)
+XORG_PROG_RAWCPP
 
 # Checks for programs.
 AC_PROG_LIBTOOL