diff --git a/CHANGELOG.md b/CHANGELOG.md
index 25d0a209..eccaccc1 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -9,6 +9,7 @@ Performance improvements:
 
 Feature enhancements:
 
+* Added or improved file type filtering for diff.
 * [FEATURE #1390](https://github.com/BurntSushi/ripgrep/pull/1390):
   Add new `--no-context-separator` flag that always hides context separators.
 
diff --git a/ignore/src/types.rs b/ignore/src/types.rs
index 1f8f99b0..fa286b54 100644
--- a/ignore/src/types.rs
+++ b/ignore/src/types.rs
@@ -134,6 +134,7 @@ const DEFAULT_TYPES: &'static [(&'static str, &'static [&'static str])] = &[
     ("dart", &["*.dart"]),
     ("d", &["*.d"]),
     ("dhall", &["*.dhall"]),
+    ("diff", &["*.patch", "*.diff"]),
     ("docker", &["*Dockerfile*"]),
     ("edn", &["*.edn"]),
     ("elisp", &["*.el"]),