diff --git a/src/library/base/man/connections.Rd b/src/library/base/man/connections.Rd
index 6375d19878d..32db4770354 100644
--- a/src/library/base/man/connections.Rd
+++ b/src/library/base/man/connections.Rd
@@ -121,7 +121,7 @@ socketTimeout(socket, timeout = -1)
     requests.  It is ignored for non-HTTP URLs.  The \code{User-Agent}
     header, coming from the \code{HTTPUserAgent} option (see
     \code{\link{options}}) is used as the first header, automatically.}
-  \item{compression}{integer in 0--9 (1--19 for \code{zstdfile}).  The
+  \item{compression}{integer in 0--9 (1--22 for \code{zstdfile}).  The
     amount of compression to be applied when writing, from minimal to
     maximal available.  For \code{xzfile} and \code{zstdfile} can also
     be negative: see the \sQuote{Compression} section.}
diff --git a/src/main/connections.c b/src/main/connections.c
index b34d1282ddc..e83dda6935e 100644
--- a/src/main/connections.c
+++ b/src/main/connections.c
@@ -2761,7 +2761,7 @@ attribute_hidden SEXP do_gzfile(SEXP call, SEXP op, SEXP args, SEXP env)
     }
     if(type == 3) {
 	compress = asInteger(CADDDR(args));
-	if(compress == NA_LOGICAL || abs(compress) > 19)
+	if(compress == NA_LOGICAL || abs(compress) > 22)
 	    error(_("invalid '%s' argument"), "compress");
     }
     open = CHAR(STRING_ELT(sopen, 0)); /* ASCII */