diff --git a/cmd/zhack/zhack.c b/cmd/zhack/zhack.c
index cc4f174c66..e76945141a 100644
--- a/cmd/zhack/zhack.c
+++ b/cmd/zhack/zhack.c
@@ -69,9 +69,10 @@ usage(void)
 	(void) fprintf(stderr,
 	    "    feature stat <pool>\n"
 	    "        print information about enabled features\n"
-	    "    feature enable [-d desc] <pool> <feature>\n"
+	    "    feature enable [-r] [-d desc] <pool> <feature>\n"
 	    "        add a new enabled feature to the pool\n"
 	    "        -d <desc> sets the feature's description\n"
+	    "        -r set read-only compatible flag for feature\n"
 	    "    feature ref [-md] <pool> <feature>\n"
 	    "        change the refcount on the given feature\n"
 	    "        -d decrease instead of increase the refcount\n"
@@ -318,7 +319,7 @@ zhack_do_feature_enable(int argc, char **argv)
 	feature.fi_feature = SPA_FEATURE_NONE;
 
 	optind = 1;
-	while ((c = getopt(argc, argv, "rmd:")) != -1) {
+	while ((c = getopt(argc, argv, "+rd:")) != -1) {
 		switch (c) {
 		case 'r':
 			feature.fi_flags |= ZFEATURE_FLAG_READONLY_COMPAT;
@@ -416,7 +417,7 @@ zhack_do_feature_ref(int argc, char **argv)
 	feature.fi_feature = SPA_FEATURE_NONE;
 
 	optind = 1;
-	while ((c = getopt(argc, argv, "md")) != -1) {
+	while ((c = getopt(argc, argv, "+md")) != -1) {
 		switch (c) {
 		case 'm':
 			feature.fi_flags |= ZFEATURE_FLAG_MOS;
@@ -522,7 +523,7 @@ main(int argc, char **argv)
 	dprintf_setup(&argc, argv);
 	zfs_prop_init();
 
-	while ((c = getopt(argc, argv, "c:d:")) != -1) {
+	while ((c = getopt(argc, argv, "+c:d:")) != -1) {
 		switch (c) {
 		case 'c':
 			g_importargs.cachefile = optarg;
diff --git a/tests/runfiles/linux.run b/tests/runfiles/linux.run
index 5685ea21ba..783eef94f4 100644
--- a/tests/runfiles/linux.run
+++ b/tests/runfiles/linux.run
@@ -295,7 +295,6 @@ tests = ['zpool_history_001_neg', 'zpool_history_002_pos']
 # DISABLED:
 # zpool_import_012_pos - sharenfs issue
 # zpool_import_all_001_pos - partition issue
-# zpool_import_features_003_pos - zhack: invalid option -- 'r'
 [tests/functional/cli_root/zpool_import]
 tests = ['zpool_import_001_pos', 'zpool_import_002_pos',
     'zpool_import_003_pos', 'zpool_import_004_pos', 'zpool_import_005_pos',
@@ -303,7 +302,7 @@ tests = ['zpool_import_001_pos', 'zpool_import_002_pos',
     'zpool_import_009_neg', 'zpool_import_010_pos', 'zpool_import_011_neg',
     'zpool_import_013_neg',
     'zpool_import_features_001_pos', 'zpool_import_features_002_neg',
-    'zpool_import_missing_001_pos',
+    'zpool_import_features_003_pos','zpool_import_missing_001_pos',
     'zpool_import_missing_002_pos', 'zpool_import_missing_003_pos',
     'zpool_import_rename_001_pos']