diff --git a/target/linux/ar71xx/image/Makefile b/target/linux/ar71xx/image/Makefile
index e9ffd77d9c..64cd854a30 100644
--- a/target/linux/ar71xx/image/Makefile
+++ b/target/linux/ar71xx/image/Makefile
@@ -142,9 +142,9 @@ define CatFiles
 			rm -f $(5); \
 		fi; \
 	else if [ $(2) -gt 262144 -a `stat -c%s "$(1)"` -gt $(2) ]; then \
-		echo "Warning: $(1) is too big" >&2; \
+		echo "Warning: $(1) is too big (> $(2) bytes)" >&2; \
 	else if [ `stat -c%s $(3)` -gt $(4) ]; then \
-		echo "Warning: $(3) is too big" >&2; \
+		echo "Warning: $(3) is too big (> $(4) bytes)" >&2; \
 	else \
 		( dd if=$(1) bs=$(2) conv=sync; dd if=$(3) ) > $(5); \
 	fi; fi; fi