diff --git a/src/module.zig b/src/module.zig
index fbd886a..156101c 100644
--- a/src/module.zig
+++ b/src/module.zig
@@ -23,7 +23,7 @@ pub const Module = opaque {
     }
 
     pub fn initFromWat(engine: *Engine, wat_bytes: []const u8, diag: ?*Diagnostics) !*Module {
-        const wasm_bytes = try wat2wasm(wat_bytes);
+        const wasm_bytes = try wat2wasm(wat_bytes, diag);
         defer wasm_bytes.deinit();
         return init(engine, wasm_bytes.toSlice(), diag);
     }