diff --git a/aini_test.go b/aini_test.go
index 5b50898..1d1ccd7 100644
--- a/aini_test.go
+++ b/aini_test.go
@@ -124,6 +124,8 @@ func TestBelongToBasicGroups(t *testing.T) {
 
 func TestGroupStructure(t *testing.T) {
 	v := parseString(t, `
+	host5
+	
 	[web:children]
 	nginx
 	apache
diff --git a/parser.go b/parser.go
index 432c7cf..bd3c30d 100644
--- a/parser.go
+++ b/parser.go
@@ -72,6 +72,9 @@ func (inventory *InventoryData) parse(reader *bufio.Reader) error {
 			}
 			for k, v := range hosts {
 				activeGroup.Hosts[k] = v
+				if activeGroup.Name != "ungrouped" {
+					delete(inventory.Groups["ungrouped"].Hosts, k)
+				}
 			}
 			for _, host := range hosts {
 				inventory.Hosts[host.Name] = host