--- a/program/psiconv/psiconv.h	2023-02-26 23:52:30.388543728 +0100
+++ b/program/psiconv/psiconv.h	2023-02-27 00:04:01.305397816 +0100
@@ -52,7 +52,7 @@
   output_function *output;
 } *fileformat;
 
-psiconv_list fileformat_list; /* of struct psiconv_fileformat */
+static psiconv_list fileformat_list; /* of struct psiconv_fileformat */
 
 
 #endif /* PSICONV_H */