diff --git a/ext/readline/.gitignore b/ext/readline/.gitignore
new file mode 100644
index 0000000000..3d372989ae
--- /dev/null
+++ b/ext/readline/.gitignore
@@ -0,0 +1 @@
+/readline-[1-9]*.*
diff --git a/ext/zlib/.gitignore b/ext/zlib/.gitignore
new file mode 100644
index 0000000000..069491b4b4
--- /dev/null
+++ b/ext/zlib/.gitignore
@@ -0,0 +1 @@
+/zlib-[1-9]*.*.*