diff --git a/src/storage/json/parser.rs b/src/storage/json/parser.rs
index e0981a9d..fc663303 100644
--- a/src/storage/json/parser.rs
+++ b/src/storage/json/parser.rs
@@ -15,7 +15,7 @@ struct JsonHeaderParser<'a> {
     spec: &'a FileHeaderSpec,
 }
 
-impl<'a> FileHeaderParser<'a> for JsonHeaderParser<'a> {
+impl JsonHeaderParser {
 
     fn new(spec: &'a FileHeaderSpec) -> JsonHeaderParser<'a> {
         JsonHeaderParser {
@@ -23,6 +23,10 @@ impl<'a> FileHeaderParser<'a> for JsonHeaderParser<'a> {
         }
     }
 
+}
+
+impl FileHeaderParser for JsonHeaderParser {
+
     fn read(&self, string: Option<String>)
         -> Result<FileHeaderData, ParserError>
     {