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diff --git a/src/tools/clippy/src/docs/mem_replace_with_default.txt b/src/tools/clippy/src/docs/mem_replace_with_default.txt
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+++ b/src/tools/clippy/src/docs/mem_replace_with_default.txt
@@ -0,0 +1,18 @@
+### What it does
+Checks for `std::mem::replace` on a value of type
+`T` with `T::default()`.
+
+### Why is this bad?
+`std::mem` module already has the method `take` to
+take the current value and replace it with the default value of that type.
+
+### Example
+```
+let mut text = String::from("foo");
+let replaced = std::mem::replace(&mut text, String::default());
+```
+Is better expressed with:
+```
+let mut text = String::from("foo");
+let taken = std::mem::take(&mut text);
+```
+\ No newline at end of file