diff --git a/db/compaction_picker.cc b/db/compaction_picker.cc
index 72ba5f7dd..13e3d94c2 100644
--- a/db/compaction_picker.cc
+++ b/db/compaction_picker.cc
@@ -47,6 +47,8 @@ uint64_t TotalCompensatedFileSize(const std::vector<FileMetaData*>& files) {
 // and the index of the file in that level
 
 struct InputFileInfo {
+  InputFileInfo() : f(nullptr) {}
+
   FileMetaData* f;
   size_t level;
   size_t index;