Index: altium/pcbdoc_bin.c
===================================================================
--- altium/pcbdoc_bin.c	(revision 35471)
+++ altium/pcbdoc_bin.c	(revision 35472)
@@ -129,7 +129,7 @@
 
 static long read_rec_ilb(ucdf_file_t *fp, altium_buf_t *tmp, int *id)
 {
-	char ids[2];
+	unsigned char ids[2];
 	long res;
 
 	if ((res = ucdf_fread(fp, (void *)ids, 2)) != 2)