diff --git a/tree/forest/v7/inc/ROOT/RColumn.hxx b/tree/forest/v7/inc/ROOT/RColumn.hxx
index c8f60ed3a496f397dc9352fb49220c11b6731ddf..1761b385589030908ee31dcf6963e521e43e4002 100644
--- a/tree/forest/v7/inc/ROOT/RColumn.hxx
+++ b/tree/forest/v7/inc/ROOT/RColumn.hxx
@@ -29,9 +29,6 @@
 
 namespace ROOT {
 namespace Experimental {
-
-class RColumnModel;
-
 namespace Detail {
 
 // clang-format off