diff --git a/trustfall_wasm/src/lib.rs b/trustfall_wasm/src/lib.rs
index e564949e..d0732cd2 100644
--- a/trustfall_wasm/src/lib.rs
+++ b/trustfall_wasm/src/lib.rs
@@ -74,7 +74,7 @@ pub fn execute_query(
     // TODO: add a proper error type
     let args = from_js_args(args)?;
 
-    let query = trustfall_core::frontend::parse(schema, query).map_err(|e| format!("{e}"))?;
+    let query = trustfall_core::frontend::parse(schema, query).map_err(|e| format!("{e:?}"))?;
 
     let wrapped_adapter = Arc::new(AdapterShim::new(adapter));