diff --git a/src/db/unit_tests/dbTriangleTests.cc b/src/db/unit_tests/dbTriangleTests.cc
index fb6aba531..3fcf703c1 100644
--- a/src/db/unit_tests/dbTriangleTests.cc
+++ b/src/db/unit_tests/dbTriangleTests.cc
@@ -25,6 +25,7 @@
 #include "tlUnitTest.h"
 
 #include <list>
+#include <memory>
 
 class TestableTriangleEdge
   : public db::TriangleEdge