diff -r aec6c1503dbf -r 012d491e219a nbproject/project.xml
--- a/nbproject/project.xml	Sat Jun 06 01:50:42 2020 +0200
+++ b/nbproject/project.xml	Wed Sep 23 11:23:12 2020 +0200
@@ -6,7 +6,7 @@
             <name>relpipe-in-csv.cpp</name>
             <c-extensions/>
             <cpp-extensions>cpp</cpp-extensions>
-            <header-extensions/>
+            <header-extensions>h</header-extensions>
             <sourceEncoding>UTF-8</sourceEncoding>
             <make-dep-projects/>
             <sourceRootList>