diff --git a/lib/std/Build/Step/Compile.zig b/lib/std/Build/Step/Compile.zig
index 9a06ca87246bc344ab64166c7551a2c910854903..448e3b0dde840fae5d42c2b194fc404b5eb01cd0 100644
--- a/lib/std/Build/Step/Compile.zig
+++ b/lib/std/Build/Step/Compile.zig
@@ -25,6 +25,7 @@ root_module: *Module,
 name: []const u8,
 linker_script: ?LazyPath = null,
 version_script: ?LazyPath = null,
+/// Deprecated.
 out_filename: []const u8,
 linkage: ?std.builtin.LinkMode = null,
 version: ?std.SemanticVersion,