diff --git a/tools/mkfimg.c b/tools/mkfimg.c
index 392b4e6..6c36b4f 100644
--- a/tools/mkfimg.c
+++ b/tools/mkfimg.c
@@ -111,7 +111,8 @@ if (type < 0) {
 fname = argv[optind];
 width = atoi(argv[optind+1]);	height = atoi(argv[optind+2]);	
 
-if (verbosity) fprintf(stderr, "making  '%s'  %d x %d\n", fname, width, height);
+if (verbosity) fprintf(stderr, "making  '%s'  %d x %d, type %d\n",
+		fname, width, height, type);
 
 srand48(getpid() ^ time(NULL));
 
@@ -130,6 +131,7 @@ switch(type) {
 	case T_HDEG_A:		fimg_hdeg_a(&fimg, 1.0);	break;
 	case T_VDEG_A:		fimg_vdeg_a(&fimg, 1.0);	break;
 	case T_TPAT0:		fimg_test_pattern(&fimg, 0, fvalue); break;
+	case -1:		exit(1);
 	}
 
 foo = fimg_dump_to_file(&fimg, fname, 0);