diff --git a/misc/mke2fs.c b/misc/mke2fs.c
index 7ec8cc2..d1944dc 100644
--- a/misc/mke2fs.c
+++ b/misc/mke2fs.c
@@ -1351,6 +1351,8 @@ profile_error:
 					optarg);
 				exit(1);
 			}
+			fs_param.s_feature_ro_compat |=
+					EXT4_FEATURE_RO_COMPAT_BIGALLOC;
 			break;
 		case 'D':
 			direct_io = 1;