--- a/nbproject/project.xml	Fri Jul 27 00:07:16 2018 +0200
+++ b/nbproject/project.xml	Sat Jul 28 08:13:35 2018 +0200
@@ -6,7 +6,7 @@
             <name>relpipe-in-cli.cpp</name>
             <c-extensions/>
             <cpp-extensions>cpp</cpp-extensions>
-            <header-extensions/>
+            <header-extensions>h</header-extensions>
             <sourceEncoding>UTF-8</sourceEncoding>
             <make-dep-projects/>
             <sourceRootList/>