diff --git a/examples/gum/fast_interceptor/src/main.rs b/examples/gum/fast_interceptor/src/main.rs
index 6e4fc4e5..7c0ee77e 100644
--- a/examples/gum/fast_interceptor/src/main.rs
+++ b/examples/gum/fast_interceptor/src/main.rs
@@ -76,7 +76,10 @@ fn replace_normal() {
     let test_func_ptr = test_func as *mut c_void;
     let test_detour_ptr = test_detour as *mut c_void;
     unsafe {
-        *ORIGINAL_TEST.lock().unwrap().get_mut() = Some(std::mem::transmute(
+        *ORIGINAL_TEST.lock().unwrap().get_mut() = Some(std::mem::transmute::<
+            *mut libc::c_void,
+            extern "C" fn(*const i8) -> u32,
+        >(
             interceptor
                 .replace(
                     NativePointer(test_func_ptr),
@@ -94,7 +97,10 @@ fn replace_fast() {
     let test_func_ptr = test_func as *mut c_void;
     let test_detour_ptr = test_detour as *mut c_void;
     unsafe {
-        *ORIGINAL_TEST.lock().unwrap().get_mut() = Some(std::mem::transmute(
+        *ORIGINAL_TEST.lock().unwrap().get_mut() = Some(std::mem::transmute::<
+            *mut libc::c_void,
+            extern "C" fn(*const i8) -> u32,
+        >(
             interceptor
                 .replace_fast(NativePointer(test_func_ptr), NativePointer(test_detour_ptr))
                 .unwrap()
diff --git a/examples/gum/hook_open/src/lib.rs b/examples/gum/hook_open/src/lib.rs
index a85417e9..d4d00cfd 100644
--- a/examples/gum/hook_open/src/lib.rs
+++ b/examples/gum/hook_open/src/lib.rs
@@ -32,7 +32,10 @@ fn init() {
     let mut interceptor = Interceptor::obtain(&GUM);
     let open = Module::find_export_by_name(None, "open").unwrap();
     unsafe {
-        *ORIGINAL_OPEN.lock().unwrap().get_mut() = Some(std::mem::transmute(
+        *ORIGINAL_OPEN.lock().unwrap().get_mut() = Some(std::mem::transmute::<
+            *mut libc::c_void,
+            unsafe extern "C" fn(*const i8, i32) -> i32,
+        >(
             interceptor
                 .replace(
                     open,