diff --git a/aegisub/src/spellchecker_hunspell.h b/aegisub/src/spellchecker_hunspell.h
index 0b31f518c..61e446d2a 100644
--- a/aegisub/src/spellchecker_hunspell.h
+++ b/aegisub/src/spellchecker_hunspell.h
@@ -36,6 +36,7 @@
 
 #ifdef WITH_HUNSPELL
 
+#include <memory>
 #include <hunspell/hunspell.hxx>
 
 #include "include/aegisub/spellchecker.h"