1 files changed, 3 insertions, 0 deletions
diff --git a/src/lib/corelib/buildgraph/forward_decls.h b/src/lib/corelib/buildgraph/forward_decls.h
index 2baa74d6d..91c89e483 100644
--- a/src/lib/corelib/buildgraph/forward_decls.h
+++ b/src/lib/corelib/buildgraph/forward_decls.h
@@ -35,8 +35,11 @@ namespace qbs {
 namespace Internal {
 
 class Artifact;
+class ArtifactSet;
 class ProjectBuildData;
 class ProductBuildData;
+class Node;
+class NodeSet;
 
 class Transformer;
 typedef QSharedPointer<Transformer> TransformerPtr;