diff --git a/COPYING b/COPYING
index 1a34e3d..f616ab9 100644
--- a/COPYING
+++ b/COPYING
@@ -2,10 +2,17 @@
 applications that use U-Boot services by means of the jump table
 provided by U-Boot exactly for this purpose - this is merely
 considered normal use of U-Boot, and does *not* fall under the
-heading of "derived work". Also note that the GPL below is
-copyrighted by the Free Software Foundation, but the instance of code
-that it refers to (the U-Boot source code) is copyrighted by me and
-others who actually wrote it. -- Wolfgang Denk
+heading of "derived work".
+
+  The header files "include/image.h" and "include/asm-*/u-boot.h"
+define interfaces to U-Boot. Including these (unmodified) header
+files in another file is considered normal use of U-Boot, and does
+*not* fall under the heading of "derived work".
+
+  Also note that the GPL below is copyrighted by the Free Software
+Foundation, but the instance of code that it refers to (the U-Boot
+source code) is copyrighted by me and others who actually wrote it.
+-- Wolfgang Denk
 
 =======================================================================