diff --git a/src/net/dial.go b/src/net/dial.go
index e081fca7b7..3098d35b42 100644
--- a/src/net/dial.go
+++ b/src/net/dial.go
@@ -203,8 +203,10 @@ type Dialer struct {
 	// connection but before actually dialing.
 	//
 	// Network and address parameters passed to Control function are not
-	// necessarily the ones passed to Dial. For example, passing "tcp" to Dial
-	// will cause the Control function to be called with "tcp4" or "tcp6".
+	// necessarily the ones passed to Dial. Calling Dial with TCP networks
+	// will cause the Control function to be called with "tcp4" or "tcp6",
+	// UDP networks become "udp4" or "udp6", IP networks become "ip4" or "ip6",
+	// and other known networks are passed as-is.
 	//
 	// Control is ignored if ControlContext is not nil.
 	Control func(network, address string, c syscall.RawConn) error
@@ -213,8 +215,10 @@ type Dialer struct {
 	// connection but before actually dialing.
 	//
 	// Network and address parameters passed to ControlContext function are not
-	// necessarily the ones passed to Dial. For example, passing "tcp" to Dial
-	// will cause the ControlContext function to be called with "tcp4" or "tcp6".
+	// necessarily the ones passed to Dial. Calling Dial with TCP networks
+	// will cause the ControlContext function to be called with "tcp4" or "tcp6",
+	// UDP networks become "udp4" or "udp6", IP networks become "ip4" or "ip6",
+	// and other known networks are passed as-is.
 	//
 	// If ControlContext is not nil, Control is ignored.
 	ControlContext func(ctx context.Context, network, address string, c syscall.RawConn) error
@@ -739,9 +743,11 @@ type ListenConfig struct {
 	// If Control is not nil, it is called after creating the network
 	// connection but before binding it to the operating system.
 	//
-	// Network and address parameters passed to Control method are not
-	// necessarily the ones passed to Listen. For example, passing "tcp" to
-	// Listen will cause the Control function to be called with "tcp4" or "tcp6".
+	// Network and address parameters passed to Control function are not
+	// necessarily the ones passed to Listen. Calling Listen with TCP networks
+	// will cause the Control function to be called with "tcp4" or "tcp6",
+	// UDP networks become "udp4" or "udp6", IP networks become "ip4" or "ip6",
+	// and other known networks are passed as-is.
 	Control func(network, address string, c syscall.RawConn) error
 
 	// KeepAlive specifies the keep-alive period for network