diff --git a/ports/libsimpleservo/capi/src/lib.rs b/ports/libsimpleservo/capi/src/lib.rs
index 69c543000e2..9710b5e1241 100644
--- a/ports/libsimpleservo/capi/src/lib.rs
+++ b/ports/libsimpleservo/capi/src/lib.rs
@@ -216,11 +216,8 @@ pub struct CHostCallbacks {
     pub prompt_alert: extern "C" fn(message: *const c_char, trusted: bool),
     pub prompt_ok_cancel: extern "C" fn(message: *const c_char, trusted: bool) -> CPromptResult,
     pub prompt_yes_no: extern "C" fn(message: *const c_char, trusted: bool) -> CPromptResult,
-    pub prompt_input: extern "C" fn(
-        message: *const c_char,
-        def: *const c_char,
-        trusted: bool,
-    ) -> *const c_char,
+    pub prompt_input:
+        extern "C" fn(message: *const c_char, def: *const c_char, trusted: bool) -> *const c_char,
     pub on_devtools_started:
         extern "C" fn(result: CDevtoolsServerState, port: c_uint, token: *const c_char),
     pub show_context_menu: