diff --git a/internal/forms/multipart_test.go b/internal/forms/multipart_test.go
index 632c515..3dbc546 100644
--- a/internal/forms/multipart_test.go
+++ b/internal/forms/multipart_test.go
@@ -24,12 +24,16 @@ func makeExportRequest(ej *xport.ExportJob, url string) *http.Request {
 
 	perr(body.WriteField("systemID", strconv.Itoa(int(ej.SystemID))))
 
+	perr(body.WriteField("talkgroups", "3,4"))
+
 	w, err := body.CreateFormFile("template", ej.TemplateFileName)
 	perr(err)
 
 	_, err = w.Write(ej.Template)
 	perr(err)
 
+	body.Close()
+
 	r, err := http.NewRequest(http.MethodPost, url, &buf)
 	perr(err)
 
diff --git a/internal/forms/unmarshal_test.go b/internal/forms/unmarshal_test.go
index 25ec5d2..bdc32e7 100644
--- a/internal/forms/unmarshal_test.go
+++ b/internal/forms/unmarshal_test.go
@@ -14,6 +14,8 @@ import (
 
 	"dynatron.me/x/stillbox/pkg/alerting"
 	"dynatron.me/x/stillbox/pkg/config"
+	"dynatron.me/x/stillbox/pkg/talkgroups"
+	"dynatron.me/x/stillbox/pkg/talkgroups/filter"
 	"dynatron.me/x/stillbox/pkg/talkgroups/tgstore"
 	"dynatron.me/x/stillbox/pkg/talkgroups/xport"
 
@@ -131,6 +133,13 @@ var (
 		SystemID:         197,
 		Template:         []byte("this is a template\n\r\nthingy"),
 		TemplateFileName: "template.xml",
+
+		TalkgroupFilter: filter.TalkgroupFilter{
+			Talkgroups: []talkgroups.ID{
+				talkgroups.TG(197, 3),
+				talkgroups.TG(197, 4),
+			},
+		},
 	}
 )
 
@@ -253,6 +262,13 @@ func TestUnmarshal(t *testing.T) {
 			expect: &ExpJob1,
 			opts:   []forms.Option{forms.WithAcceptBlank(), forms.WithOmitEmpty()},
 		},
+		{
+			name:   "multipart byte field",
+			r:      makeExportRequest(&ExpJob1, "http://somewhere/export"),
+			dest:   &xport.ExportJob{},
+			expect: &ExpJob1,
+			opts:   []forms.Option{forms.WithAcceptBlank(), forms.WithOmitEmpty()},
+		},
 	}
 
 	for _, tc := range tests {
diff --git a/pkg/talkgroups/filter/filter.go b/pkg/talkgroups/filter/filter.go
index 3072261..11c38c7 100644
--- a/pkg/talkgroups/filter/filter.go
+++ b/pkg/talkgroups/filter/filter.go
@@ -11,11 +11,11 @@ import (
 )
 
 type TalkgroupFilter struct {
-	Talkgroups       []tgsp.ID `json:"talkgroups,omitempty"`
-	TalkgroupsNot    []tgsp.ID `json:"talkgroupsNot,omitempty"`
-	TalkgroupTagsAll []string  `json:"talkgroupTagsAll,omitempty"`
-	TalkgroupTagsAny []string  `json:"talkgroupTagsAny,omitempty"`
-	TalkgroupTagsNot []string  `json:"talkgroupTagsNot,omitempty"`
+	Talkgroups       []tgsp.ID `json:"talkgroups,omitempty" form:"talkgroups"`
+	TalkgroupsNot    []tgsp.ID `json:"talkgroupsNot,omitempty" form:"talkgroupsNot"`
+	TalkgroupTagsAll []string  `json:"talkgroupTagsAll,omitempty" form:"talkgroupTagsAll"`
+	TalkgroupTagsAny []string  `json:"talkgroupTagsAny,omitempty" form:"talkgroupTagsAny"`
+	TalkgroupTagsNot []string  `json:"talkgroupTagsNot,omitempty" form:"talkgroupTagsNot"`
 
 	talkgroups map[tgsp.ID]bool `json:"-"`
 }