diff --git a/source/dub/dub.d b/source/dub/dub.d
index e0dc8aa..f9fda75 100644
--- a/source/dub/dub.d
+++ b/source/dub/dub.d
@@ -831,6 +831,7 @@
 		if (basename != name) {
 			auto subname = getSubPackageName(name);
 			auto basepack = getPackage(basename, dep);
+			if (!basepack) return null;
 			if (auto sp = basepack.getSubPackage(subname, true)) {
 				return sp;
 			} else if (!basepack.exportedPackages.length) {