1 files changed, 4 insertions, 0 deletions
diff --git a/ext/ffi_c/Type.c b/ext/ffi_c/Type.c
index 9bf5681..a94c009 100644
--- a/ext/ffi_c/Type.c
+++ b/ext/ffi_c/Type.c
@@ -128,6 +128,8 @@ type_initialize(VALUE self, VALUE value)
         rb_raise(rb_eArgError, "wrong type");
     }
 
+    rb_obj_freeze(self);
+
     return self;
 }
 
@@ -192,6 +194,8 @@ builtin_type_new(VALUE klass, int nativeType, ffi_type* ffiType, const char* nam
     type->type.nativeType = nativeType;
     type->type.ffiType = ffiType;
 
+    rb_obj_freeze(obj);
+
     return obj;
 }