diff --git a/Source/NSText.m b/Source/NSText.m
index dcf6e4738..2ad902666 100644
--- a/Source/NSText.m
+++ b/Source/NSText.m
@@ -59,6 +59,7 @@
 
 #include <AppKit/NSDragging.h>
 #include <AppKit/NSStringDrawing.h>
+#include <AppKit/NSTextStorage.h>
 
 #include <Foundation/NSNotification.h>
 #include <Foundation/NSArchiver.h>