diff --git a/src/THcShowerPlane.h b/src/THcShowerPlane.h
index bc23c1691c8cc3e65da9a6e25af2c6fa30a5edf4..ec0d7eb6e0da0f61e457f50843926536620ffb4c 100644
--- a/src/THcShowerPlane.h
+++ b/src/THcShowerPlane.h
@@ -1,5 +1,5 @@
 #ifndef ROOT_THcShowerPlane
-#define ROOT_THcShowerPlane
+#define ROOT_THcShowerPlane 
 
 //////////////////////////////////////////////////////////////////////////////
 //