diff --git a/src/Image/FILES b/src/Image/FILES
index c15cc084c0..5b70dabe66 100755
--- a/src/Image/FILES
+++ b/src/Image/FILES
@@ -1,3 +1,4 @@
+EXTERNLIB
 Image_GImage.gxx
 Image_GPixelField.gxx
 Image_GPixelField.lxx