diff --git a/lib/libc/sparc64/net/htonl.S b/lib/libc/sparc64/net/htonl.S
index c3d10e5997c..e972dfc5de5 100644
--- a/lib/libc/sparc64/net/htonl.S
+++ b/lib/libc/sparc64/net/htonl.S
@@ -57,5 +57,5 @@
         .set CNAME(htonl),CNAME(__htonl)
 ENTRY(__htonl)
 	retl
-	 srl	%o0, 0, %o0	/* zero extend -- or do we sign extend? */
+	 srl	%o0, 0, %o0	/* zero extend */
 END(__htonl)
diff --git a/lib/libc/sparc64/net/ntohl.S b/lib/libc/sparc64/net/ntohl.S
index 4a546913536..1313a4562eb 100644
--- a/lib/libc/sparc64/net/ntohl.S
+++ b/lib/libc/sparc64/net/ntohl.S
@@ -57,5 +57,5 @@
         .set CNAME(ntohl),CNAME(__ntohl)
 ENTRY(__ntohl)
 	retl
-	 signx	%o0, %o0
+	 srl	%o0, 0, %o0	/* zero extend */
 END(__ntohl)