diff --git a/route_builder.go b/route_builder.go
index 591d28c4..2cf7bd5a 100644
--- a/route_builder.go
+++ b/route_builder.go
@@ -5,10 +5,12 @@ package restful
 // that can be found in the LICENSE file.
 
 import (
+	"fmt"
 	"os"
 	"reflect"
 	"runtime"
 	"strings"
+	"sync/atomic"
 
 	"github.com/emicklei/go-restful/log"
 )
@@ -242,7 +244,7 @@ func (b *RouteBuilder) Build() Route {
 		ResponseErrors: b.errorMap,
 		ReadSample:     b.readSample,
 		WriteSample:    b.writeSample,
-		Metadata:	b.metadata}
+		Metadata:       b.metadata}
 	route.postBuild()
 	return route
 }
@@ -251,6 +253,8 @@ func concatPath(path1, path2 string) string {
 	return strings.TrimRight(path1, "/") + "/" + strings.TrimLeft(path2, "/")
 }
 
+var anonymousFuncCount int32
+
 // nameOfFunction returns the short name of the function f for documentation.
 // It uses a runtime feature for debugging ; its value may change for later Go versions.
 func nameOfFunction(f interface{}) string {
@@ -261,5 +265,10 @@ func nameOfFunction(f interface{}) string {
 	last = strings.TrimSuffix(last, ")-fm") // Go 1.5
 	last = strings.TrimSuffix(last, "·fm")  // < Go 1.5
 	last = strings.TrimSuffix(last, "-fm")  // Go 1.5
+	if last == "func1" {                    // this could mean conflicts in API docs
+		val := atomic.AddInt32(&anonymousFuncCount, 1)
+		last = "func" + fmt.Sprintf("%d", val)
+		atomic.StoreInt32(&anonymousFuncCount, val)
+	}
 	return last
 }
diff --git a/route_builder_test.go b/route_builder_test.go
index 5da510dd..3154ac22 100644
--- a/route_builder_test.go
+++ b/route_builder_test.go
@@ -59,3 +59,14 @@ func TestRouteBuilder(t *testing.T) {
 		t.Errorf("Metadata not set")
 	}
 }
+
+func TestAnonymousFuncNaming(t *testing.T) {
+	f1 := func() {}
+	f2 := func() {}
+	if got, want := nameOfFunction(f1), "func1"; got != want {
+		t.Errorf("got %v want %v", got, want)
+	}
+	if got, want := nameOfFunction(f2), "func2"; got != want {
+		t.Errorf("got %v want %v", got, want)
+	}
+}