diff --git a/editors/cmp.c b/editors/cmp.c
index 384e57c..0cb80f2 100644
--- a/editors/cmp.c
+++ b/editors/cmp.c
@@ -24,9 +24,9 @@
 #include "libbb.h"
 
 static const char fmt_eof[] ALIGN1 = "cmp: EOF on %s\n";
-static const char fmt_differ[] ALIGN1 = "%s %s differ: char %"OFF_FMT"d, line %d\n";
-// This fmt_l_opt uses gnu-isms.  SUSv3 would be "%.0s%.0s%"OFF_FMT"d %o %o\n"
-static const char fmt_l_opt[] ALIGN1 = "%.0s%.0s%"OFF_FMT"d %3o %3o\n";
+static const char fmt_differ[] ALIGN1 = "%s %s differ: char %"OFF_FMT"u, line %u\n";
+// This fmt_l_opt uses gnu-isms.  SUSv3 would be "%.0s%.0s%"OFF_FMT"u %o %o\n"
+static const char fmt_l_opt[] ALIGN1 = "%.0s%.0s%"OFF_FMT"u %3o %3o\n";
 
 static const char opt_chars[] ALIGN1 = "sl";
 #define CMP_OPT_s (1<<0)