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-rw-r--r--src/libexpr/eval.hh2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/libexpr/eval.hh b/src/libexpr/eval.hh
index 0cdf0b28300f..8eec94fcbcc6 100644
--- a/src/libexpr/eval.hh
+++ b/src/libexpr/eval.hh
@@ -5,12 +5,12 @@
 
 #include "nixexpr.hh"
 #include "symbol-table.hh"
+#include "hash.hh"
 
 
 namespace nix {
 
 
-class Hash;
 class EvalState;
 struct Env;
 struct Value;