diff --git a/libpng.3 b/libpng.3
index 80b80ec08..1607fabbd 100644
--- a/libpng.3
+++ b/libpng.3
@@ -580,6 +580,10 @@ libpng \- Portable Network Graphics (PNG) Reference Library 1.5.2beta02
 
 \fI\fB
 
+\fBvoid png_set_expand_16 (png_structp \fIpng_ptr\fP\fB);\fP
+
+\fI\fB
+
 \fBvoid png_set_expand_gray_1_2_4_to_8 (png_structp \fIpng_ptr\fP\fB);\fP
 
 \fI\fB