1 files changed, 1 insertions, 1 deletions
diff --git a/src/sp-filter.h b/src/sp-filter.h
index d0529e542..a3e7cd35c 100644
--- a/src/sp-filter.h
+++ b/src/sp-filter.h
@@ -35,7 +35,7 @@ namespace Filters {
 class Filter;
 } }
 
-struct SPFilterReference;
+class SPFilterReference;
 class SPFilterPrimitive;
 
 struct ltstr {