1 files changed, 1 insertions, 0 deletions
diff --git a/deflateBound.3 b/deflateBound.3
index d8f91d5..59958cf 100644
--- a/deflateBound.3
+++ b/deflateBound.3
@@ -10,6 +10,7 @@
 .Lb libz
 .
 .Sh SYNOPSIS
+.In zlib.h
 .Ft uLong
 .Fn deflateBound "z_streamp strm" "uLong sourceLen"
 .