--- a/nbproject/project.xml	Fri Mar 08 20:11:23 2019 +0100
+++ b/nbproject/project.xml	Fri Mar 08 22:38:58 2019 +0100
@@ -44,7 +44,7 @@
         <data xmlns="http://www.netbeans.org/ns/make-project/1">
             <name>spacenav-lib-hack</name>
             <c-extensions>c</c-extensions>
-            <cpp-extensions>cpp</cpp-extensions>
+            <cpp-extensions>cpp,cxx</cpp-extensions>
             <header-extensions>h</header-extensions>
             <sourceEncoding>UTF-8</sourceEncoding>
             <sourceRootList>