diff --git a/composition/fetch_definition.go b/composition/fetch_definition.go
index 8649026..fc700f6 100644
--- a/composition/fetch_definition.go
+++ b/composition/fetch_definition.go
@@ -28,6 +28,7 @@ var ForwardRequestHeaders = []string{
 	"Transfer-Encoding",
 	"X-Forwarded-Host",
 	"X-Correlation-Id",
+	"X-Feature-Toggle",
 }
 
 // ForwardResponseHeaders are those headers,
diff --git a/composition/fetch_definition_test.go b/composition/fetch_definition_test.go
index ad4d6ac..2197e84 100644
--- a/composition/fetch_definition_test.go
+++ b/composition/fetch_definition_test.go
@@ -19,6 +19,7 @@ func Test_FetchDefinition_NewFetchDefinitionFromRequest(t *testing.T) {
 	r.Header = http.Header{
 		"Content-Type":    {"text/html"},
 		"Cookie":          {"aa=bb;"},
+		"X-Feature-Toggle": {"true"},
 		"Accept-Encoding": {"gzip"}, // should not be copied
 	}
 
@@ -29,6 +30,7 @@ func Test_FetchDefinition_NewFetchDefinitionFromRequest(t *testing.T) {
 
 	a.Equal("text/html", fd.Header.Get("Content-Type"))
 	a.Equal("aa=bb;", fd.Header.Get("Cookie"))
+	a.Equal("true", fd.Header.Get("X-Feature-Toggle"))
 	a.Equal("", fd.Header.Get("Accept-Encoding"))
 
 	a.Equal("POST", fd.Method)