1 files changed, 1 insertions, 0 deletions
diff --git a/prec.c b/prec.c
index 3b245248c5..84de958be8 100644
--- a/prec.c
+++ b/prec.c
@@ -125,6 +125,7 @@ void
 Init_Precision(void)
 {
 #undef rb_intern
+#define rb_intern(str) rb_intern_const(str)
 
     rb_mPrecision = rb_define_module("Precision");
     rb_define_singleton_method(rb_mPrecision, "included", prec_included, 1);