diff --git a/xcb-util/atom/atoms.gperf.m4 b/xcb-util/atom/atoms.gperf.m4
index 63c98db..83a2246 100644
--- a/xcb-util/atom/atoms.gperf.m4
+++ b/xcb-util/atom/atoms.gperf.m4
@@ -84,7 +84,7 @@ int GetAtomName(XCBConnection *c, XCBATO
 {
 	static char buf[100];
 	const char *name = GetAtomNamePredefined(atom);
-	int len;
+	int namelen;
 	XCBGetAtomNameCookie atomc;
 	XCBGetAtomNameRep *atomr;
 	if(name)
@@ -97,11 +97,11 @@ int GetAtomName(XCBConnection *c, XCBATO
 	atomr = XCBGetAtomNameReply(c, atomc, 0);
 	if(!atomr)
 		return 0;
-	len = XCBGetAtomNameNameLength(atomr);
-	if(len > sizeof(buf))
-		len = sizeof(buf);
-	*lengthp = len;
-	memcpy(buf, XCBGetAtomNameName(atomr), len);
+	namelen = XCBGetAtomNameNameLength(atomr);
+	if(namelen > sizeof(buf))
+		namelen = sizeof(buf);
+	*lengthp = namelen;
+	memcpy(buf, XCBGetAtomNameName(atomr), namelen);
 	*namep = buf;
 	free(atomr);
 	return 1;