diff --git a/qbsp/map.cc b/qbsp/map.cc
index a3974ee9..1148b446 100644
--- a/qbsp/map.cc
+++ b/qbsp/map.cc
@@ -20,6 +20,7 @@
 */
 
 #include <string>
+#include <memory>
 
 #include <ctype.h>
 #include <string.h>