diff --git a/src/lwp/.gitignore b/src/lwp/.gitignore
new file mode 100644
index 0000000000..fde87e7343
--- /dev/null
+++ b/src/lwp/.gitignore
@@ -0,0 +1,5 @@
+# After changing this file, please run
+#     git ls-files -i --exclude-standard
+# to check that you haven't inadvertently ignored any tracked files.
+
+/rw
diff --git a/src/lwp/Makefile.in b/src/lwp/Makefile.in
index 74b8598316..f83c6dd14a 100644
--- a/src/lwp/Makefile.in
+++ b/src/lwp/Makefile.in
@@ -224,6 +224,6 @@ buildtools: ${TOP_LIBDIR}/liblwp.a depinstall
 #
 clean:
 	$(LT_CLEAN)
-	$(RM) -f *.o *.a core AFS_component_version_number.c
+	$(RM) -f *.o *.a core rw AFS_component_version_number.c
 
 include ../config/Makefile.version