diff --git a/procps/kill.c b/procps/kill.c
index e418046..1d343ed 100644
--- a/procps/kill.c
+++ b/procps/kill.c
@@ -195,7 +195,7 @@
 						continue;
 					errors++;
 					if (!quiet)
-						bb_perror_msg("can't kill pid %u", (unsigned)*pl);
+						bb_perror_msg("can't kill pid %d", (int)*pl);
 				}
 			}
 			free(pidList);