diff --git a/DataStructures/BinaryHeap.h b/DataStructures/BinaryHeap.h
index 00d3782f3..6903be1b3 100644
--- a/DataStructures/BinaryHeap.h
+++ b/DataStructures/BinaryHeap.h
@@ -36,6 +36,7 @@ SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #include <type_traits>
 #include <unordered_map>
 #include <vector>
+#include <cstring>
 
 template <typename NodeID, typename Key> class ArrayStorage
 {