diff --git a/src/utils.rs b/src/utils.rs
index c5965bd2f..62cf07d9e 100644
--- a/src/utils.rs
+++ b/src/utils.rs
@@ -37,9 +37,9 @@ pub(crate) fn get_tokio_runtime(py: Python) -> PyRef<TokioRuntime> {
 }
 
 /// Utility to collect rust futures with GIL released
-pub fn wait_for_future<F: Future>(py: Python, f: F) -> F::Output
+pub fn wait_for_future<F>(py: Python, f: F) -> F::Output
 where
-    F: Send,
+    F: Future + Send,
     F::Output: Send,
 {
     let runtime: &Runtime = &get_tokio_runtime(py).0;