--- a/nbproject/project.xml	Sat Aug 25 12:29:03 2018 +0200
+++ b/nbproject/project.xml	Mon Sep 03 23:44:34 2018 +0200
@@ -5,7 +5,7 @@
         <data xmlns="http://www.netbeans.org/ns/make-project/1">
             <name>relpipe-out-tabular.cpp</name>
             <c-extensions/>
-            <cpp-extensions/>
+            <cpp-extensions>cpp</cpp-extensions>
             <header-extensions/>
             <sourceEncoding>UTF-8</sourceEncoding>
             <make-dep-projects/>