diff --git a/book/Makefile b/book/Makefile
index a0f2131..a4c41c9 100644
--- a/book/Makefile
+++ b/book/Makefile
@@ -24,7 +24,7 @@ html-linkcheck: clean html
 # spell check all sources
 # NOTE: diagrams are not yet spell checked, but we emit the required changes
 codespell:
-	@$(PRINTF) "The following change suggestions are only warnings!\n"
+	@$(PRINTF) "The following change suggestions are only warnings! (Please don't fix them)\n"
 	@$(CODESPELL) source/diag || true
 	@$(PRINTF) "The following change suggestions are errors!\n"
 	@$(CODESPELL) .