diff --git a/m4/.gitignore b/m4/.gitignore
index bde78f43..9d0f4af8 100644
--- a/m4/.gitignore
+++ b/m4/.gitignore
@@ -1,2 +1,5 @@
 # Ignore libtoolize-generated files.
 *.m4
+!as_case.m4
+!dtrace.m4
+!libuv-check-flags.m4
\ No newline at end of file