diff --git a/env.go b/env.go
index 8e38eb8..f9e6d04 100644
--- a/env.go
+++ b/env.go
@@ -134,7 +134,9 @@ func usageValueEnv(out io.Writer, value reflect.Value, prefix string) error {
 			return err
 		}
 
-		err = usageFieldValueEnv(out, structOfField, prefix)
+		if kindOfField != reflect.Struct {
+			err = usageFieldValueEnv(out, structOfField, prefix)
+		}
 	}
 
 	return err
@@ -170,7 +172,9 @@ func parseValueEnv(value reflect.Value, prefix string) error {
 			return err
 		}
 
-		err = setFieldValueEnv(valueOfField, structOfField, prefix)
+		if kindOfField != reflect.Struct {
+			err = setFieldValueEnv(valueOfField, structOfField, prefix)
+		}
 	}
 
 	return err