diff --git a/include/swift/Basic/LangOptions.h b/include/swift/Basic/LangOptions.h
index 695533e6774e4..6b99ecac5a537 100644
--- a/include/swift/Basic/LangOptions.h
+++ b/include/swift/Basic/LangOptions.h
@@ -825,7 +825,7 @@ namespace swift {
 
     /// If true, forward declarations will be imported using unavailable types
     /// instead of dropped altogether when possible.
-    bool ImportForwardDeclarations = false;
+    bool ImportForwardDeclarations = true;
 
     /// If true ignore the swift bridged attribute.
     bool DisableSwiftBridgeAttr = false;