diff --git a/src/DataTree.hh b/src/DataTree.hh
index 51514d48e9c5ae1f6f0cb0a7feb2c83d501bb048..d8f136ca4489420bc63c59350645e975e6410960 100644
--- a/src/DataTree.hh
+++ b/src/DataTree.hh
@@ -27,6 +27,7 @@
 #include <iomanip>
 #include <cmath>
 #include <utility>
+#include <memory>
 
 #include "SymbolTable.hh"
 #include "NumericalConstants.hh"