diff --git a/libpng.3 b/libpng.3
index fa9aaf414..abe1b65b9 100644
--- a/libpng.3
+++ b/libpng.3
@@ -4229,7 +4229,8 @@ version 1.0.6j; from then on they were given the upcoming public
 release number plus "betaNN" or "rcN".
 
 .SH "SEE ALSO"
-libpngpf(3), png(5)
+.IR png(5) ", " libpngpf(3) ", " zlib(3) ", " deflate(5) ", and " zlib(5)
+
 .LP
 .IR libpng :
 .IP
diff --git a/libpngpf.3 b/libpngpf.3
index d84d62000..b1da388a9 100644
--- a/libpngpf.3
+++ b/libpngpf.3
@@ -805,6 +805,6 @@ are listed alphabetically here as an aid to libpng maintainers.
 See png.h for more information on these functions.
 
 .SH SEE ALSO
-libpng(3), png(5)
+.IR png(5) ", " libpng(3) ", " zlib(3) ", " deflate(5) ", and " zlib(5)
 .SH AUTHOR
 Glenn Randers-Pehrson
diff --git a/png.5 b/png.5
index 07ad0a936..40a40c1d7 100644
--- a/png.5
+++ b/png.5
@@ -18,7 +18,7 @@ gamma and chromaticity data for improved color matching on heterogeneous
 platforms.
 
 .SH "SEE ALSO"
-.IR libpng(3), zlib(3), deflate(5), and zlib(5)
+.IR libpng(3) ", "libpngpf(3) ", " zlib(3) ", " deflate(5) ", and " zlib(5)
 .LP
 PNG specification (second edition), November 2003:
 .IP