diff --git a/scripts/cstyle.pl b/scripts/cstyle.pl
index 5483c3fe7..123020b08 100755
--- a/scripts/cstyle.pl
+++ b/scripts/cstyle.pl
@@ -695,10 +695,13 @@ line: while (<$filehandle>) {
 			err("unary * followed by space");
 		}
 	}
-	if ($check_posix_types) {
+	if ($check_posix_types && !$in_macro_call) {
 		# try to detect old non-POSIX types.
 		# POSIX requires all non-standard typedefs to end in _t,
 		# but historically these have been used.
+		#
+		# We don't check inside macro invocations because macros have
+		# legitmate uses for these names in function generators.
 		if (/\b(unchar|ushort|uint|ulong|u_int|u_short|u_long|u_char|quad)\b/) {
 			err("non-POSIX typedef $1 used: use $old2posix{$1} instead");
 		}