diff --git a/src/liblimb/loadopt.h/loadopt.c b/src/liblimb/loadopt.h/loadopt.c
index c18d97d..bcd4b21 100644
--- a/src/liblimb/loadopt.h/loadopt.c
+++ b/src/liblimb/loadopt.h/loadopt.c
@@ -41,6 +41,14 @@ parseopt_warn(int c, const char **argv, const struct option *options,
         case ENOENT:
             if (!strncmp(argv[ctx->cur], "--", 2)) {
                 warn("unknown option: ", argv[ctx->cur]);
+                /* was there a partial match? */
+                if (ctx->idx >= 0) {
+                    const char *s = argv[ctx->cur] + ctx->off;
+                    size_t l = byte_chr(s, strlen(s), '=');
+                    list_matches_full(err_putmsg, OLVL_NORMAL, "did you mean ",
+                                      "--", " or ", " ?", s, l, ctx->idx, options,
+                                      offsetof(struct option, longopt), sizeof(*options));
+                }
             } else {
                 char buf[3] = { '-', argv[ctx->cur][ctx->off], 0 };
                 warn("unknown option: ", buf);