1 files changed, 6 insertions, 0 deletions
diff --git a/sparse.1 b/sparse.1
index 34e66088..48dab7a9 100644
--- a/sparse.1
+++ b/sparse.1
@@ -458,6 +458,12 @@ The concerned warnings are, for example, those triggered by
 Sparse does not issue these warnings by default, processing '{\ 0\ }'
 the same as '{\ }'.
 .
+.TP
+.B -Wunion-cast
+Warn on casts to union types.
+
+Sparse does not issues these warnings by default.
+.
 .SH MISC OPTIONS
 .TP
 .B \-\-arch=\fIARCH\fR