--- htpdate.c	2019-07-12 19:10:17.000000000 +0200
+++ htpdate.c.patched	2020-05-06 13:15:51.419075086 +0200
@@ -499,7 +499,7 @@
 			printlog( 1, "Error writing pid file" );
 			exit(1);
 		} else {
-			fprintf( pid_file, "%u\n", (unsigned short)pid );
+			fprintf( pid_file, "%d\n", (signed int)pid );
 			fclose( pid_file );
 		}
 		printlog( 0, "htpdate version "VERSION" started" );