2 files changed, 7 insertions, 1 deletions
diff --git a/src/parser/parser.h b/src/parser/parser.h
index 4aeb2c8..e3a5e6b 100644
--- a/src/parser/parser.h
+++ b/src/parser/parser.h
@@ -265,6 +265,7 @@ struct ParserContext
     FILE *hoist_out;   // For plugins to hoist code to file scope
     int skip_preamble; // If 1, codegen_node(NODE_ROOT) won't emit preamble
     int is_repl;       // REPL mode flag
+    int has_async;     // Track if async features are used
 };
 
 // Token helpers
diff --git a/src/parser/parser_stmt.c b/src/parser/parser_stmt.c
index 8a89cc7..4478d22 100644
--- a/src/parser/parser_stmt.c
+++ b/src/parser/parser_stmt.c
@@ -37,6 +37,11 @@ ASTNode *parse_function(ParserContext *ctx, Lexer *l, int is_async)
     Token name_tok = lexer_next(l);
     char *name = token_strdup(name_tok);
 
+    if (is_async)
+    {
+        ctx->has_async = 1;
+    }
+
     // Check for C reserved word conflict
     if (is_c_reserved_word(name))
     {
@@ -3876,7 +3881,7 @@ char *run_comptime_block(ParserContext *ctx, Lexer *l)
         zpanic("Could not create temp file %s", filename);
     }
 
-    emit_preamble(f);
+    emit_preamble(ctx, f);
     fprintf(
         f,
         "size_t _z_check_bounds(size_t index, size_t size) { if (index >= size) { fprintf(stderr, "