diff --git a/binding-mri/profiler-binding.cpp b/binding-mri/profiler-binding.cpp
index b47db51..31b4f29 100644
--- a/binding-mri/profiler-binding.cpp
+++ b/binding-mri/profiler-binding.cpp
@@ -41,7 +41,7 @@ static void tp_cb(VALUE tpval, void *) {
         const char *path = StringValuePtr(path_val);
         const char *class_name = rb_class2name(class_val);
         long line = FIX2LONG(rb_tracearg_lineno(trace_arg));
-        const char *method = rb_id2name((ID)rb_tracearg_method_id(trace_arg));
+        const char *method = rb_id2name(rb_sym2id(rb_tracearg_method_id(trace_arg)));
 
         Debug() << "[PROFILER] " << method << " " << path << ":" << line
                 << " class=" << class_name << " dur_ns=" << dur_ns << "\n";