diff --git a/src/uas/UAS.cc b/src/uas/UAS.cc
index 9b1556426ae96e977b789db38f517ab0ee581a09..65b8d9a5725d7f67b14f495e0db312a589781545 100644
--- a/src/uas/UAS.cc
+++ b/src/uas/UAS.cc
@@ -38,6 +38,11 @@
 * as the previous one created unless one calls deleteSettings in the code after
 * creating the UAS.
 */
+
+const float UAS::lipoFull = 4.2f;  ///< 100% charged voltage
+const float UAS::lipoEmpty = 3.5f; ///< Discharged voltage
+
+
 UAS::UAS(MAVLinkProtocol* protocol, int id) : UASInterface(),
     uasId(id),
     links(new QList<LinkInterface*>()),
diff --git a/src/uas/UAS.h b/src/uas/UAS.h
index 74d15c017b68a07072627265eeca2a419f8512e0..0da722b682b803652b595afea1cb0e67f60f5c22 100644
--- a/src/uas/UAS.h
+++ b/src/uas/UAS.h
@@ -56,8 +56,8 @@ public:
     UAS(MAVLinkProtocol* protocol, int id = 0);
     ~UAS();
 
-    static const float lipoFull = 4.2f;  ///< 100% charged voltage
-    static const float lipoEmpty = 3.5f; ///< Discharged voltage
+    static const float lipoFull;  ///< 100% charged voltage
+    static const float lipoEmpty; ///< Discharged voltage
 
     /* MANAGEMENT */