diff --git a/Doc/lib/libgzip.tex b/Doc/lib/libgzip.tex
index 75388a89984..4bc7d80c2c9 100644
--- a/Doc/lib/libgzip.tex
+++ b/Doc/lib/libgzip.tex
@@ -1,7 +1,8 @@
 \section{Standard Module \module{gzip}}
 \declaremodule{standard}{gzip}
 
-\modulesynopsis{None}
+\modulesynopsis{Interfaces for \program{gzip} compression and
+decompression using file objects.}
 
 
 The data compression provided by the \code{zlib} module is compatible