diff --git a/db/version_set.cc b/db/version_set.cc
index 8d85fce..597e226 100644
--- a/db/version_set.cc
+++ b/db/version_set.cc
@@ -626,7 +626,7 @@ class VersionSet::Builder {
   }
 
   // Apply all of the edits in *edit to the current state.
-  void Apply(VersionEdit* edit) {
+  void Apply(const VersionEdit* edit) {
     // Update compaction pointers
     for (size_t i = 0; i < edit->compact_pointers_.size(); i++) {
       const int level = edit->compact_pointers_[i].first;