diff --git a/tools/process-metadata b/tools/process-metadata
index 3c90a40999..d7f48ed4f5 100755
--- a/tools/process-metadata
+++ b/tools/process-metadata
@@ -7,6 +7,7 @@ $heading = "";
 $accumulated = "";
 
 print "
+/* This file was generated by tools/process-metadata */
 void
 UIConfiguration::build_metadata ()
 {
@@ -14,7 +15,11 @@ UIConfiguration::build_metadata ()
 #define VAR_META(name,...)  { char const * _x[] { __VA_ARGS__ }; all_metadata.insert (std::make_pair<std::string,Metadata> ((name), PBD::upcase (_x))); }\n\n";
 
 while (<>) {
-      if (/\[SECTION:/) {
+    if (/^#/) {
+	next;
+    }
+
+    if (/\[SECTION:/) {
 	  chop;
 	  s/\[SECTION://;
 	  s/\]//;