src/pkg/net/url/url.go      | 2 +-
 src/pkg/net/url/url_test.go | 8 ++++++++

diff --git a/src/pkg/net/url/url.go b/src/pkg/net/url/url.go
index 95432f43376e7336f3fc166f86f042ed54a78a8a..597cb51c883074434b10eca555e5ba41a88e1dbf 100644
--- a/src/pkg/net/url/url.go
+++ b/src/pkg/net/url/url.go
@@ -459,7 +459,7 @@ 			if h := u.Host; h != "" {
 				buf.WriteString(h)
 			}
 		}
-		if u.Path != "" && u.Path[0] != '/' {
+		if u.Path != "" && u.Path[0] != '/' && u.Host != "" {
 			buf.WriteByte('/')
 		}
 		buf.WriteString(escape(u.Path, encodePath))
diff --git a/src/pkg/net/url/url_test.go b/src/pkg/net/url/url_test.go
index 24f84e58ffe7a5b3d88bad1868ba2953c566dd12..7578eb15b907ba0bce2b3f207be6cc818b1eee36 100644
--- a/src/pkg/net/url/url_test.go
+++ b/src/pkg/net/url/url_test.go
@@ -260,6 +260,14 @@ 			Opaque: "webmaster@golang.org",
 		},
 		"mailto:webmaster@golang.org",
 	},
+	// Relative path
+	{
+		"a/b/c",
+		&URL{
+			Path: "a/b/c",
+		},
+		"a/b/c",
+	},
 }
 
 // more useful string for debugging than fmt's struct printer