diff --git a/runconfig/errors.go b/runconfig/errors.go
index bb72c1699c..c95a2919e8 100644
--- a/runconfig/errors.go
+++ b/runconfig/errors.go
@@ -2,45 +2,37 @@ package runconfig
 
 import (
 	"fmt"
-
-	"github.com/docker/docker/api/errors"
 )
 
 var (
 	// ErrConflictContainerNetworkAndLinks conflict between --net=container and links
-	ErrConflictContainerNetworkAndLinks = fmt.Errorf("Conflicting options: container type network can't be used with links. This would result in undefined behavior")
-	// ErrConflictUserDefinedNetworkAndLinks conflict between --net=<NETWORK> and links
-	ErrConflictUserDefinedNetworkAndLinks = fmt.Errorf("Conflicting options: networking can't be used with links. This would result in undefined behavior")
+	ErrConflictContainerNetworkAndLinks = fmt.Errorf("conflicting options: container type network can't be used with links. This would result in undefined behavior")
 	// ErrConflictSharedNetwork conflict between private and other networks
-	ErrConflictSharedNetwork = fmt.Errorf("Container sharing network namespace with another container or host cannot be connected to any other network")
+	ErrConflictSharedNetwork = fmt.Errorf("container sharing network namespace with another container or host cannot be connected to any other network")
 	// ErrConflictHostNetwork conflict from being disconnected from host network or connected to host network.
-	ErrConflictHostNetwork = fmt.Errorf("Container cannot be disconnected from host network or connected to host network")
+	ErrConflictHostNetwork = fmt.Errorf("container cannot be disconnected from host network or connected to host network")
 	// ErrConflictNoNetwork conflict between private and other networks
-	ErrConflictNoNetwork = fmt.Errorf("Container cannot be connected to multiple networks with one of the networks in private (none) mode")
+	ErrConflictNoNetwork = fmt.Errorf("container cannot be connected to multiple networks with one of the networks in private (none) mode")
 	// ErrConflictNetworkAndDNS conflict between --dns and the network mode
-	ErrConflictNetworkAndDNS = fmt.Errorf("Conflicting options: dns and the network mode")
+	ErrConflictNetworkAndDNS = fmt.Errorf("conflicting options: dns and the network mode")
 	// ErrConflictNetworkHostname conflict between the hostname and the network mode
-	ErrConflictNetworkHostname = fmt.Errorf("Conflicting options: hostname and the network mode")
+	ErrConflictNetworkHostname = fmt.Errorf("conflicting options: hostname and the network mode")
 	// ErrConflictHostNetworkAndLinks conflict between --net=host and links
-	ErrConflictHostNetworkAndLinks = fmt.Errorf("Conflicting options: host type networking can't be used with links. This would result in undefined behavior")
+	ErrConflictHostNetworkAndLinks = fmt.Errorf("conflicting options: host type networking can't be used with links. This would result in undefined behavior")
 	// ErrConflictContainerNetworkAndMac conflict between the mac address and the network mode
-	ErrConflictContainerNetworkAndMac = fmt.Errorf("Conflicting options: mac-address and the network mode")
+	ErrConflictContainerNetworkAndMac = fmt.Errorf("conflicting options: mac-address and the network mode")
 	// ErrConflictNetworkHosts conflict between add-host and the network mode
-	ErrConflictNetworkHosts = fmt.Errorf("Conflicting options: custom host-to-IP mapping and the network mode")
+	ErrConflictNetworkHosts = fmt.Errorf("conflicting options: custom host-to-IP mapping and the network mode")
 	// ErrConflictNetworkPublishPorts conflict between the publish options and the network mode
-	ErrConflictNetworkPublishPorts = fmt.Errorf("Conflicting options: port publishing and the container type network mode")
+	ErrConflictNetworkPublishPorts = fmt.Errorf("conflicting options: port publishing and the container type network mode")
 	// ErrConflictNetworkExposePorts conflict between the expose option and the network mode
-	ErrConflictNetworkExposePorts = fmt.Errorf("Conflicting options: port exposing and the container type network mode")
+	ErrConflictNetworkExposePorts = fmt.Errorf("conflicting options: port exposing and the container type network mode")
 	// ErrUnsupportedNetworkAndIP conflict between network mode and requested ip address
-	ErrUnsupportedNetworkAndIP = fmt.Errorf("User specified IP address is supported on user defined networks only")
+	ErrUnsupportedNetworkAndIP = fmt.Errorf("user specified IP address is supported on user defined networks only")
 	// ErrUnsupportedNetworkNoSubnetAndIP conflict between network with no configured subnet and requested ip address
-	ErrUnsupportedNetworkNoSubnetAndIP = fmt.Errorf("User specified IP address is supported only when connecting to networks with user configured subnets")
+	ErrUnsupportedNetworkNoSubnetAndIP = fmt.Errorf("user specified IP address is supported only when connecting to networks with user configured subnets")
 	// ErrUnsupportedNetworkAndAlias conflict between network mode and alias
-	ErrUnsupportedNetworkAndAlias = fmt.Errorf("Network-scoped alias is supported only for containers in user defined networks")
+	ErrUnsupportedNetworkAndAlias = fmt.Errorf("network-scoped alias is supported only for containers in user defined networks")
 	// ErrConflictUTSHostname conflict between the hostname and the UTS mode
-	ErrConflictUTSHostname = fmt.Errorf("Conflicting options: hostname and the UTS mode")
+	ErrConflictUTSHostname = fmt.Errorf("conflicting options: hostname and the UTS mode")
 )
-
-func conflictError(err error) error {
-	return errors.NewRequestConflictError(err)
-}