diff --git a/object.c b/object.c
index 705ba7ff1c..6e739014a1 100644
--- a/object.c
+++ b/object.c
@@ -2922,6 +2922,7 @@ static const struct conv_method_tbl {
     M(a),
     M(s),
     M(i),
+    M(f),
     M(r),
 #undef M
 };