diff --git a/src/grids.cpp b/src/grids.cpp
index ca426d2445..431479a0ac 100644
--- a/src/grids.cpp
+++ b/src/grids.cpp
@@ -46,6 +46,7 @@
 #include <cstdint>
 #include <cstring>
 #include <limits>
+#include <memory>
 
 NS_PROJ_START