diff --git a/configure.in b/configure.in
index 638b756..285c00c 100644
--- a/configure.in
+++ b/configure.in
@@ -7,7 +7,7 @@
 dnl Checks for programs.
 AC_PROG_CC
 AC_PROG_INSTALL
-AC_PATH_PROG(CPP, cpp, /lib/cpp)
+AC_PROG_CPP
 AC_PATH_PROG(RM, rm, /bin/rm)
 AC_PATH_PROG(MV, mv, /bin/mv)
 AC_PATH_PROG(TAR, tar, /bin/tar)