Index: uspace/app/df/df.c
===================================================================
--- uspace/app/df/df.c	(revision f2d88f3fc01df99a1e5292a3a395c0754a4ef3fa)
+++ uspace/app/df/df.c	(revision f52ce72297a1fb0d499b966c3d9a3f0ab18eef6d)
@@ -70,5 +70,5 @@
 
 	/* Parse command-line options */
-	while ((optres = getopt(argc, argv, ":ubh")) != -1) {
+	while ((optres = getopt(argc, argv, "ubh")) != -1) {
 		switch (optres) {
 		case 'h':
@@ -78,10 +78,4 @@
 		case 'b':
 			display_blocks = true;
-			break;
-
-		case ':':
-			fprintf(stderr, "Option -%c requires an operand\n",
-			    optopt);
-			errflg++;
 			break;