1 files changed, 2 insertions, 2 deletions
diff --git a/src/ir/boolean.h b/src/ir/boolean.h
index 58601c2ce..68dfb8b32 100644
--- a/src/ir/boolean.h
+++ b/src/ir/boolean.h
@@ -26,8 +26,8 @@ inline bool emitsBoolean(Expression* curr) {
     return unary->isRelational();
   } else if (auto* binary = curr->dynCast<Binary>()) {
     return binary->isRelational();
-  } else if (curr->is<RefIs>() || curr->is<RefEq>() || curr->is<RefTest>() ||
-             curr->is<StringEq>()) {
+  } else if (curr->is<RefIsNull>() || curr->is<RefEq>() ||
+             curr->is<RefTest>() || curr->is<StringEq>()) {
     return true;
   }
   return false;