diff --git a/stage0/astgen_test.zig b/stage0/astgen_test.zig
index ef17ca7159..027fba15a5 100644
--- a/stage0/astgen_test.zig
+++ b/stage0/astgen_test.zig
@@ -1281,7 +1281,7 @@ const corpus_files = .{
     "../test/behavior/saturating_arithmetic.zig",
     "../test/behavior/select.zig",
     "../test/behavior/shuffle.zig",
-    //"../test/behavior/sizeof_and_typeof.zig",
+    "../test/behavior/sizeof_and_typeof.zig",
     "../test/behavior/slice_sentinel_comptime.zig",
     //"../test/behavior/src.zig",
     //"../test/behavior/string_literals.zig",