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-rw-r--r--src/libstore/store-api.hh1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/libstore/store-api.hh b/src/libstore/store-api.hh
index 40887b6aa3a0..7a1b31d0ff59 100644
--- a/src/libstore/store-api.hh
+++ b/src/libstore/store-api.hh
@@ -11,6 +11,7 @@
 #include <atomic>
 #include <limits>
 #include <map>
+#include <unordered_map>
 #include <unordered_set>
 #include <memory>
 #include <string>