diff --git a/ruby.c b/ruby.c
index d722489aca..e87e6f46ea 100644
--- a/ruby.c
+++ b/ruby.c
@@ -219,6 +219,7 @@ enum {
 #endif
 	& ~FEATURE_BIT(frozen_string_literal)
         & ~FEATURE_BIT(jit)
+        & ~FEATURE_BIT(yjit)
 	)
 };