diff --git a/sstables/sstables.cc b/sstables/sstables.cc
index 40a4f932e7..e8bf0323a6 100644
--- a/sstables/sstables.cc
+++ b/sstables/sstables.cc
@@ -1348,7 +1348,7 @@ const bool sstable::has_component(component_type f) {
     return _components.count(f);
 }
 
-const sstring sstable::filename(component_type f) {
+const sstring sstable::filename(component_type f) const {
     return filename(_dir, _ks, _cf, _version, _generation, _format, f);
 }
 
diff --git a/sstables/sstables.hh b/sstables/sstables.hh
index 5d17738fc2..c263a57e66 100644
--- a/sstables/sstables.hh
+++ b/sstables/sstables.hh
@@ -296,7 +296,7 @@ private:
 
     const bool has_component(component_type f);
 
-    const sstring filename(component_type f);
+    const sstring filename(component_type f) const;
     const sstring temporary_filename(component_type f);
 
     template <sstable::component_type Type, typename T>