diff --git a/cf/roken-frag.m4 b/cf/roken-frag.m4
index efe9ad1c2..277f9236c 100644
--- a/cf/roken-frag.m4
+++ b/cf/roken-frag.m4
@@ -64,6 +64,7 @@ AC_CHECK_HEADERS([\
 	pwd.h					\
 	rpcsvc/ypclnt.h				\
 	shadow.h				\
+	stdint.h				\
 	sys/bswap.h				\
 	sys/ioctl.h				\
 	sys/mman.h				\
@@ -86,6 +87,10 @@ AC_CHECK_HEADERS([\
 	util.h					\
 ])
 
+AC_HAVE_TYPE([uintptr_t],[#ifdef HAVE_STDINT_H
+#include <stdint.h>
+#endif])
+
 dnl Sunpro 5.2 has a vis.h which is something different.
 AC_CHECK_HEADERS(vis.h, , , [
 #include <vis.h>