1 files changed, 1 insertions, 0 deletions
diff --git a/Shell/Forward.h b/Shell/Forward.h
index f54829b191..94d5cf7eda 100644
--- a/Shell/Forward.h
+++ b/Shell/Forward.h
@@ -32,5 +32,6 @@ namespace AST {
 class Node;
 class Value;
 class SyntaxError;
+class Pipeline;
 
 }