diff --git a/src/file_types.zig b/src/file_types.zig
index ba8395c..da5b4aa 100644
--- a/src/file_types.zig
+++ b/src/file_types.zig
@@ -347,7 +347,7 @@ pub const @"ssh-config" = .{
 pub const swift = .{
     .color = 0xf05138,
     .icon = "󰛥",
-    .extensions = .{ "swift" },
+    .extensions = .{ "swift", "swiftinterface" },
     .comment = "//",
     .language_server = .{"sourcekit-lsp"},
     .formatter = .{ "swift-format" },