diff --git a/configure.in b/configure.in
index 3e28961cb1..eafeb011b6 100644
--- a/configure.in
+++ b/configure.in
@@ -6,7 +6,7 @@ MACOS_VERSION=9.9.99
 AC_SUBST(MACOS_VERSION)
 
 AC_PROG_CC
-AC_CHECK_PROGS(CPP,[/lib/cpp /usr/bin/cpp /usr/ccs/lib/cpp cpp])
+AC_CHECK_PROGS(CPP,[/lib/cpp /usr/bin/cpp /usr/ccs/lib/cpp cpp],,[$PATH:/])
 OPENAFS_CONFIGURE_COMMON
 
 if test -d 'doc/man-pages' ; then