diff --git a/split.c b/split.c
index 69a0ee6..c859c9a 100644
--- a/split.c
+++ b/split.c
@@ -58,7 +58,7 @@ main(int argc, char *argv[])
 		break;
 	case 'b':
 		always = 1;
-		if ((size = parseoffset(EARGF(usage()))) < 0)
+		if ((size = parseoffset(EARGF(usage()))) <= 0)
 			return 1;
 		break;
 	case 'd':