diff --git a/daemon/networkdriver/portallocator/portallocator.go b/daemon/networkdriver/portallocator/portallocator.go
index c6e8a66e8d..e5dd077a9e 100644
--- a/daemon/networkdriver/portallocator/portallocator.go
+++ b/daemon/networkdriver/portallocator/portallocator.go
@@ -14,7 +14,7 @@ type portMap struct {
 
 func newPortMap() *portMap {
 	return &portMap{
-		p: map[int]struct{}{},
+		p:    map[int]struct{}{},
 		last: EndPortRange,
 	}
 }
diff --git a/daemon/networkdriver/portallocator/portallocator_test.go b/daemon/networkdriver/portallocator/portallocator_test.go
index 9869c332e9..3fb218502c 100644
--- a/daemon/networkdriver/portallocator/portallocator_test.go
+++ b/daemon/networkdriver/portallocator/portallocator_test.go
@@ -214,3 +214,19 @@ func TestPortAllocation(t *testing.T) {
 		t.Fatal("Requesting a dynamic port should never allocate a used port")
 	}
 }
+
+func TestNoDuplicateBPR(t *testing.T) {
+	defer reset()
+
+	if port, err := RequestPort(defaultIP, "tcp", BeginPortRange); err != nil {
+		t.Fatal(err)
+	} else if port != BeginPortRange {
+		t.Fatalf("Expected port %d got %d", BeginPortRange, port)
+	}
+
+	if port, err := RequestPort(defaultIP, "tcp", 0); err != nil {
+		t.Fatal(err)
+	} else if port == BeginPortRange {
+		t.Fatalf("Acquire(0) allocated the same port twice: %d", port)
+	}
+}