diff --git a/CHANGELOG.md b/CHANGELOG.md
index 09af8a5..01b7620 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -10,8 +10,8 @@
 ### Changed
 
 - Formatted code identifiers in Changelog
-- Attributes `accept-charset`, `class`, `for`, `headers`, `ping`, `rel`, and
-`sandbox` have variadic string parameters.
+- Attributes `accept`, `accept-charset`, `class`, `for`, `headers`, `ping`,
+`rel`, `srcset`, and `sandbox` have variadic string parameters.
 
 ## [0.0.4] - 2019-05-27
 
diff --git a/attribute/generated.go b/attribute/generated.go
index 17e9a9b..1bbe738 100644
--- a/attribute/generated.go
+++ b/attribute/generated.go
@@ -8,10 +8,10 @@ import "strings"
 import "strconv"
 
 // Accept sets the content types or file types allowed in a form or file input.
-func Accept(value string) hatmill.Attrib {
+func Accept(value ...string) hatmill.Attrib {
 	return hatmill.Attrib{
 		Key:   "accept",
-		Value: value,
+		Value: strings.Join(value, ","),
 	}
 }
 
@@ -677,10 +677,10 @@ func Srclang(value string) hatmill.Attrib {
 }
 
 // Srcset creates a "srcset" attribute
-func Srcset(value string) hatmill.Attrib {
+func Srcset(value ...string) hatmill.Attrib {
 	return hatmill.Attrib{
 		Key:   "srcset",
-		Value: value,
+		Value: strings.Join(value, ","),
 	}
 }
 
diff --git a/attribute/generated_test.go b/attribute/generated_test.go
index be1a0a5..cb17874 100644
--- a/attribute/generated_test.go
+++ b/attribute/generated_test.go
@@ -23,6 +23,15 @@ func TestSpaceList(t *testing.T) {
 	})
 }
 
+func TestCommaList(t *testing.T) {
+	t.Run("empty", func(t *testing.T) {
+		testAttribValue(t, attribute.Class(), "")
+	})
+	t.Run("nonempty", func(t *testing.T) {
+		testAttribValue(t, attribute.Accept("alpha", "bravo", "charlie"), "alpha,bravo,charlie")
+	})
+}
+
 func TestString(t *testing.T) {
 	const s = "abcdefg"
 	testAttribValue(t, attribute.Id(s), s)
diff --git a/defs.json b/defs.json
index f5a18d6..815f7f3 100644
--- a/defs.json
+++ b/defs.json
@@ -1,6 +1,6 @@
 {
   "attributes": [
-    {"name": "accept", "type": "string", "comment": "Accept sets the content types or file types allowed in a form or file input."},
+    {"name": "accept", "type": "comma list", "comment": "Accept sets the content types or file types allowed in a form or file input."},
     {"name": "accept-charset", "type": "space list"},
     {"name": "action", "type": "string"},
     {"name": "alt", "type": "string"},
@@ -86,7 +86,7 @@
     {"name": "src", "type": "string"},
     {"name": "srcdoc", "type": "string"},
     {"name": "srclang", "type": "string"},
-    {"name": "srcset", "type": "string"},
+    {"name": "srcset", "type": "comma list"},
     {"name": "start", "type": "string"},
     {"name": "style", "type": "string"},
     {"name": "tabindex", "type": "int"},
diff --git a/internal/codegen/codegen.go b/internal/codegen/codegen.go
index 9e43cd2..67afa8a 100644
--- a/internal/codegen/codegen.go
+++ b/internal/codegen/codegen.go
@@ -39,6 +39,16 @@ func simpleTemplate(paramType, convertExpr string) string {
 	`, paramType, conversion)
 }
 
+func listTemplate(separator string) string {
+	return fmt.Sprintf(`func %%s(value ...string) hatmill.Attrib {
+		return hatmill.Attrib{
+			Key: "%%s",
+			Value: strings.Join(value, "%s"),
+		}
+	}
+	`, separator)
+}
+
 var attribTypes = map[string]AttribTypeInfo{
 	"string": {Template: simpleTemplate("string", "%s")},
 	"bool": {
@@ -62,14 +72,12 @@ var attribTypes = map[string]AttribTypeInfo{
 		Imports:  []string{"strconv"},
 	},
 	"space list": {
-		Template: `func %s(value ...string) hatmill.Attrib {
-			return hatmill.Attrib{
-				Key: "%s",
-				Value: strings.Join(value, " "),
-			}
-		}
-		`,
-		Imports: []string{"strings"},
+		Template: listTemplate(" "),
+		Imports:  []string{"strings"},
+	},
+	"comma list": {
+		Template: listTemplate(","),
+		Imports:  []string{"strings"},
 	},
 }