diff --git a/rjit_c.rb b/rjit_c.rb
index d311c55b56..045f9a9df5 100644
--- a/rjit_c.rb
+++ b/rjit_c.rb
@@ -1210,7 +1210,7 @@ module RubyVM::RJIT # :nodoc: all
   def C.rb_method_cfunc_t
     @rb_method_cfunc_t ||= CType::Struct.new(
       "rb_method_cfunc_struct", Primitive.cexpr!("SIZEOF(struct rb_method_cfunc_struct)"),
-      func: [CType::Immediate.parse("void *"), Primitive.cexpr!("OFFSETOF((*((struct rb_method_cfunc_struct *)NULL)), func)")],
+      func: [self.rb_cfunc_t, Primitive.cexpr!("OFFSETOF((*((struct rb_method_cfunc_struct *)NULL)), func)")],
       invoker: [CType::Immediate.parse("void *"), Primitive.cexpr!("OFFSETOF((*((struct rb_method_cfunc_struct *)NULL)), invoker)")],
       argc: [CType::Immediate.parse("int"), Primitive.cexpr!("OFFSETOF((*((struct rb_method_cfunc_struct *)NULL)), argc)")],
     )
@@ -1594,6 +1594,10 @@ module RubyVM::RJIT # :nodoc: all
     CType::Stub.new(:rb_event_flag_t)
   end
 
+  def C.rb_cfunc_t
+    CType::Stub.new(:rb_cfunc_t)
+  end
+
   def C.rb_method_alias_t
     CType::Stub.new(:rb_method_alias_t)
   end
diff --git a/yjit/src/cruby_bindings.inc.rs b/yjit/src/cruby_bindings.inc.rs
index e1cfeec22b..02b4de68f3 100644
--- a/yjit/src/cruby_bindings.inc.rs
+++ b/yjit/src/cruby_bindings.inc.rs
@@ -411,10 +411,11 @@ pub const VM_METHOD_TYPE_OPTIMIZED: rb_method_type_t = 9;
 pub const VM_METHOD_TYPE_MISSING: rb_method_type_t = 10;
 pub const VM_METHOD_TYPE_REFINED: rb_method_type_t = 11;
 pub type rb_method_type_t = u32;
+pub type rb_cfunc_t = ::std::option::Option<unsafe extern "C" fn() -> VALUE>;
 #[repr(C)]
 #[derive(Debug, Copy, Clone)]
 pub struct rb_method_cfunc_struct {
-    pub func: ::std::option::Option<unsafe extern "C" fn() -> VALUE>,
+    pub func: rb_cfunc_t,
     pub invoker: ::std::option::Option<
         unsafe extern "C" fn(
             recv: VALUE,