diff --git a/internal/weldr/api.go b/internal/weldr/api.go
index e45ef120b..bbb3e22d9 100644
--- a/internal/weldr/api.go
+++ b/internal/weldr/api.go
@@ -802,7 +802,6 @@ func (api *API) sourceNewHandler(writer http.ResponseWriter, request *http.Reque
 			err = errors_package.New("'url' field is missing from request")
 		}
 	}
-
 	if err != nil {
 		errors := responseError{
 			ID:  "ProjectsError",
@@ -812,6 +811,22 @@ func (api *API) sourceNewHandler(writer http.ResponseWriter, request *http.Reque
 		return
 	}
 
+	// If there is a list of distros, check to make sure they are valid
+	invalid := []string{}
+	for _, d := range source.SourceConfig().Distros {
+		if !common.IsStringInSortedSlice(api.distros.List(), d) {
+			invalid = append(invalid, d)
+		}
+	}
+	if len(invalid) > 0 {
+		errors := responseError{
+			ID:  "ProjectsError",
+			Msg: "Invalid distributions: " + strings.Join(invalid, ","),
+		}
+		statusResponseError(writer, http.StatusBadRequest, errors)
+		return
+	}
+
 	// Is there an existing System Repo using this id?
 	for _, n := range api.systemRepoNames() {
 		if n == source.GetKey() {
diff --git a/internal/weldr/json.go b/internal/weldr/json.go
index 669b93f8b..6514ffc8e 100644
--- a/internal/weldr/json.go
+++ b/internal/weldr/json.go
@@ -186,6 +186,7 @@ func NewSourceConfigV1(id string, s store.SourceConfig) SourceConfigV1 {
 	sc.CheckGPG = s.CheckGPG
 	sc.CheckSSL = s.CheckSSL
 	sc.System = s.System
+	sc.Distros = s.Distros
 
 	return sc
 }
@@ -201,6 +202,7 @@ type SourceConfigV1 struct {
 	System   bool     `json:"system" toml:"system"`
 	Proxy    string   `json:"proxy,omitempty" toml:"proxy,omitempty"`
 	GPGUrls  []string `json:"gpgkey_urls,omitempty" toml:"gpgkey_urls,omitempty"`
+	Distros  []string `json:"distros,omitempty" toml:"distros,omitempty"`
 }
 
 // Key returns the key, .ID in this case
@@ -226,6 +228,7 @@ func (s SourceConfigV1) SourceConfig() (ssc store.SourceConfig) {
 	ssc.URL = s.URL
 	ssc.CheckGPG = s.CheckGPG
 	ssc.CheckSSL = s.CheckSSL
+	ssc.Distros = s.Distros
 
 	return ssc
 }