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-rw-r--r--src/libstore/download.hh2
-rw-r--r--src/libstore/fs-accessor.hh2
2 files changed, 4 insertions, 0 deletions
diff --git a/src/libstore/download.hh b/src/libstore/download.hh
index c68381846948..68565bf462a7 100644
--- a/src/libstore/download.hh
+++ b/src/libstore/download.hh
@@ -91,6 +91,8 @@ class Store;
 
 struct Downloader
 {
+    virtual ~Downloader() { }
+
     /* Enqueue a download request, returning a future to the result of
        the download. The future may throw a DownloadError
        exception. */
diff --git a/src/libstore/fs-accessor.hh b/src/libstore/fs-accessor.hh
index f703e1d15404..64780a6daf40 100644
--- a/src/libstore/fs-accessor.hh
+++ b/src/libstore/fs-accessor.hh
@@ -19,6 +19,8 @@ public:
         uint64_t narOffset = 0; // regular files only
     };
 
+    virtual ~FSAccessor() { }
+
     virtual Stat stat(const Path & path) = 0;
 
     virtual StringSet readDirectory(const Path & path) = 0;