diff --git a/dlib/gui_widgets/base_widgets.h b/dlib/gui_widgets/base_widgets.h
index f08948b66..781226b10 100644
--- a/dlib/gui_widgets/base_widgets.h
+++ b/dlib/gui_widgets/base_widgets.h
@@ -14,7 +14,7 @@
 #include "../set.h"
 #include "../array2d.h"
 #include "../pixel.h"
-#include "../image_transforms.h"
+#include "../image_transforms/assign_image.h"
 #include "../array.h" 
 #include "style.h"
 #include "../smart_pointers.h"
diff --git a/dlib/gui_widgets/canvas_drawing.h b/dlib/gui_widgets/canvas_drawing.h
index e6f45cd7a..1a077d42e 100644
--- a/dlib/gui_widgets/canvas_drawing.h
+++ b/dlib/gui_widgets/canvas_drawing.h
@@ -9,7 +9,7 @@
 #include "../algs.h"
 #include "../array2d.h"
 #include "../pixel.h"
-#include "../image_transforms.h"
+#include "../image_transforms/assign_image.h"
 #include "../geometry.h"
 #include <cmath>