diff --git a/src/panic.rs b/src/panic.rs
index ae1c2cdba..351e24f77 100644
--- a/src/panic.rs
+++ b/src/panic.rs
@@ -17,7 +17,7 @@ pub fn maybe_resume_unwind() {
 
 /// Generic wrapper for JS engine callbacks panic-catching
 pub fn wrap_panic<F, R>(function: F, generic_return_type: R) -> R
-    where F: FnMut() -> R + UnwindSafe
+    where F: FnOnce() -> R + UnwindSafe
 {
     let result = catch_unwind(function);
     match result {