diff --git a/instant-xml-macros/src/de.rs b/instant-xml-macros/src/de.rs
index 281ceba..2b0e6df 100644
--- a/instant-xml-macros/src/de.rs
+++ b/instant-xml-macros/src/de.rs
@@ -260,8 +260,8 @@ impl Deserializer {
                             match def_prefix {
                                 Some(def_prefix) => {
                                     // Check if defined and gotten namespaces equals for each field
-                                    if deserializer.get_parser_namespace(&parser_prefix)
-                                        != deserializer.get_def_namespace(def_prefix) {
+                                    if deserializer.parser_namespace(&parser_prefix)
+                                        != deserializer.default_namespace(def_prefix) {
                                         return Err(Error::WrongNamespace)
                                     }
                                 }
diff --git a/instant-xml/src/lib.rs b/instant-xml/src/lib.rs
index aa6fdb9..71e7787 100644
--- a/instant-xml/src/lib.rs
+++ b/instant-xml/src/lib.rs
@@ -236,12 +236,12 @@ impl<'xml> Deserializer<'xml> {
         self.parser.peek_next_tag()
     }
 
-    pub fn get_def_namespace(&self, prefix: &str) -> Option<&&str> {
-        self.def_namespaces.get(prefix)
+    pub fn default_namespace(&self, prefix: &str) -> Option<&str> {
+        self.def_namespaces.get(prefix).map(|&ns| ns)
     }
 
-    pub fn get_parser_namespace(&self, prefix: &str) -> Option<&&str> {
-        self.parser_namespaces.get(prefix)
+    pub fn parser_namespace(&self, prefix: &str) -> Option<&str> {
+        self.parser_namespaces.get(prefix).map(|&ns| ns)
     }
 
     pub fn compare_parser_and_def_default_namespaces(&self) -> bool {