diff --git a/restream/replace/replace.go b/restream/replace/replace.go
index f7771319..016978e7 100644
--- a/restream/replace/replace.go
+++ b/restream/replace/replace.go
@@ -42,7 +42,7 @@ type replacer struct {
 func New() Replacer {
 	r := &replacer{
 		replacers:  make(map[string]replace),
-		re:         regexp.MustCompile(`{([a-z:]+)(?:\^(.))?(?:,(.*?))?}`),
+		re:         regexp.MustCompile(`{([a-z]+(?::[0-9A-Za-z]+)?)(?:\^(.))?(?:,(.*?))?}`),
 		templateRe: regexp.MustCompile(`{([a-z:]+)}`),
 	}
 
diff --git a/restream/replace/replace_test.go b/restream/replace/replace_test.go
index f69a96f8..59a42e5e 100644
--- a/restream/replace/replace_test.go
+++ b/restream/replace/replace_test.go
@@ -148,9 +148,16 @@ func TestReplaceGlob(t *testing.T) {
 		},
 		nil,
 	)
+	r.RegisterReplaceFunc(
+		"foo:123",
+		func(params map[string]string, config *app.Config, section string) string {
+			return "Hello 456"
+		},
+		nil,
+	)
 
-	replaced := r.Replace("{foo:baz}, {foo:bar}", "foo:*", "", nil, nil, "")
-	require.Equal(t, "Hello foobaz, Hello foobar", replaced)
+	replaced := r.Replace("{foo:baz}, {foo:bar}, {foo:123}", "foo:*", "", nil, nil, "")
+	require.Equal(t, "Hello foobaz, Hello foobar, Hello 456", replaced)
 }
 
 func TestParseParams(t *testing.T) {