diff --git a/include/Novelec_MCCE2.h b/include/Novelec_MCCE2.h
index c9e8deacdc0ef314008777a0616fb44afc34e8c3..e4912018b7e1f99eaa537088f3dd75295dfa8a30 100755
--- a/include/Novelec_MCCE2.h
+++ b/include/Novelec_MCCE2.h
@@ -86,7 +86,9 @@ public:
 	*/
 	std::string electrometer_status		(void);
 
-  virtual std::vector<std::string> ranges_list(void) {};
+  virtual std::vector<std::string> ranges_list(void) {
+  	return std::vector<std::string>() ;
+  };
 
 
 protected :
diff --git a/pom.xml b/pom.xml
index 37ae229b6eb1ef94ee49184549cd8e9020cd6b89..46cb27ed0bebfac6d341794545ceedfd1ecef103 100755
--- a/pom.xml
+++ b/pom.xml
@@ -8,7 +8,7 @@
    </parent>
    <groupId>fr.soleil.lib</groupId>
    <artifactId>Electrometers-${aol}-${library}-${mode}</artifactId>
-   <version>2.7.0</version>
+   <version>2.7.1</version>
    <packaging>nar</packaging>
    <name>Electrometers library</name>
    <description>Electrometers library</description>