diff --git a/usr.bin/finger/lprint.c b/usr.bin/finger/lprint.c
index d8f649f93853..85603b52aa36 100644
--- a/usr.bin/finger/lprint.c
+++ b/usr.bin/finger/lprint.c
@@ -188,7 +188,7 @@ lprint(pn)
 			delta = gmtime(&w->idletime);
 			if (delta->tm_yday || delta->tm_hour || delta->tm_min) {
 				cpr += printf("%-*s idle ",
-				    maxlen - strlen(w->tty) + 1, ",");
+				    maxlen - (int)strlen(w->tty) + 1, ",");
 				if (delta->tm_yday > 0) {
 					cpr += printf("%d day%s ",
 					   delta->tm_yday,