--- a/native/engine/src/flink_functions/hyperbolic.rs
+++ b/native/engine/src/flink_functions/hyperbolic.rs
@@ -67,7 +67,7 @@
     }
 }

-fn apply(args: &[ArrayRef], function: fn(f64) -> f64) -> Result<ArrayRef> {
+fn apply<F: Fn(f64) -> f64>(args: &[ArrayRef], function: F) -> Result<ArrayRef> {
     if args.len() != 1 {
         return exec_err!("Hyperbolic functions require one argument");
     }