diff --git a/Makefile b/Makefile
index 700c77f5643..f67b28f75a4 100644
--- a/Makefile
+++ b/Makefile
@@ -317,6 +317,7 @@ ifeq ($(uname_O),Cygwin)
 	NO_STRLCPY = YesPlease
 	NO_SYMLINK_HEAD = YesPlease
 	NEEDS_LIBICONV = YesPlease
+	NO_C99_FORMAT = YesPlease
 	# There are conflicting reports about this.
 	# On some boxes NO_MMAP is needed, and not so elsewhere.
 	# Try uncommenting this if you see things break -- YMMV.