diff --git a/src/lib.zig b/src/lib.zig
index d56b44e8b7a8df53535736ac9220308a92797c17..a95a219eddd488b8576dd453efc0f98602018322 100644
--- a/src/lib.zig
+++ b/src/lib.zig
@@ -176,7 +176,7 @@ inline fn do(alloc: std.mem.Allocator, writer: anytype, comptime value: astgen.V
                     comptime assertEqual(v.args.len, 2);
                     const y = resolveArg(v.args[1], data, ctx);
                     if (@typeInfo(@TypeOf(x)) == .Enum and comptime std.meta.trait.isZigString(@TypeOf(y))) {
-                        return try doif(alloc, writer, body, bottom, data, ctx, opts, std.mem.eql(u8, @tagName(x), y));
+                        return try doif(alloc, writer, body, bottom, data, ctx, opts, !std.mem.eql(u8, @tagName(x), y));
                     }
                     try doif(alloc, writer, body, bottom, data, ctx, opts, x != y);
                 },