diff --git a/doc/make.sh-usage b/doc/make.sh-usage
index e2b8b9d29..5b615fb54 100644
--- a/doc/make.sh-usage
+++ b/doc/make.sh-usage
@@ -21,5 +21,5 @@ OPTIONS:
 			Cross-compile for this target architecture.  Uses the QEMU 
 			  emulator if needed to virtualise the desired target 
 			  architecture.  Can be permanently set with 
-			  TARGET_ARCH= in .config file.
+			  BUILD_ARCH= in .config file.