diff --git a/src/whisper_params.rs b/src/whisper_params.rs
index 607a65d0..3c83e690 100644
--- a/src/whisper_params.rs
+++ b/src/whisper_params.rs
@@ -38,7 +38,7 @@ pub struct FullParams<'a, 'b> {
     phantom_lang: PhantomData<&'a str>,
     phantom_tokens: PhantomData<&'b [c_int]>,
     grammar: Option<Vec<whisper_rs_sys::whisper_grammar_element>>,
-    progess_callback_safe: Option<Arc<Box<dyn FnMut(i32)>>>,
+    progress_callback_safe: Option<Arc<Box<dyn FnMut(i32)>>>,
     abort_callback_safe: Option<Arc<Box<dyn FnMut() -> bool>>>,
     segment_calllback_safe: Option<Arc<SegmentCallbackFn>>,
 }
@@ -75,7 +75,7 @@ impl<'a, 'b> FullParams<'a, 'b> {
             phantom_lang: PhantomData,
             phantom_tokens: PhantomData,
             grammar: None,
-            progess_callback_safe: None,
+            progress_callback_safe: None,
             abort_callback_safe: None,
             segment_calllback_safe: None,
         }
@@ -579,16 +579,18 @@ impl<'a, 'b> FullParams<'a, 'b> {
         }
 
         match closure.into() {
-            Some(mut closure) => {
-                self.fp.progress_callback = Some(trampoline::<F>);
-                self.fp.progress_callback_user_data = &mut closure as *mut F as *mut c_void;
-                // store the closure internally to make sure that the pointer above remains valid
-                self.progess_callback_safe = Some(Arc::new(Box::new(closure)));
+            Some(closure) => {
+                self.fp.progress_callback = Some(trampoline::<Box<dyn FnMut(i32)>>);
+                let boxed_closure = Box::new(closure) as Box<dyn FnMut(i32)>;
+                let boxed_closure = Box::new(boxed_closure);
+                let raw_ptr = Box::into_raw(boxed_closure);
+                self.fp.progress_callback_user_data = raw_ptr as *mut c_void;
+                self.progress_callback_safe = None;
             }
             None => {
                 self.fp.progress_callback = None;
                 self.fp.progress_callback_user_data = std::ptr::null_mut::<c_void>();
-                self.progess_callback_safe = None;
+                self.progress_callback_safe = None;
             }
         }
     }