1 files changed, 3 insertions, 0 deletions
diff --git a/compile.c b/compile.c
index 2e10659afa..a9c2f96781 100644
--- a/compile.c
+++ b/compile.c
@@ -4537,6 +4537,9 @@ rb_node_case_when_optimizable_literal(const NODE *const node)
 	    modf(RFLOAT_VALUE(v), &ival) == 0.0) {
 	    return FIXABLE(ival) ? LONG2FIX((long)ival) : rb_dbl2big(ival);
 	}
+        if (RB_TYPE_P(v, T_RATIONAL) || RB_TYPE_P(v, T_COMPLEX)) {
+            return Qundef;
+        }
 	if (SYMBOL_P(v) || rb_obj_is_kind_of(v, rb_cNumeric)) {
 	    return v;
 	}