diff --git a/CHANGES b/CHANGES
index 987862f2d8..e5c524acb6 100644
--- a/CHANGES
+++ b/CHANGES
@@ -1,3 +1,8 @@
+5567.	[bug]		Dig now reports unknown dash options while pre-parsing
+			the options.  This prevents '-multi' instead of
+			'+multi' reporting memory usage before ending option
+			parsing on 'Invalid option: -lti'. [GL #2403]
+
 5566.	[func]		Add "stale-answer-client-timeout" option, which
 			is the amount of time a recursive resolver waits before
 			attempting to answer the query using stale data from cache.
diff --git a/bin/dig/dig.c b/bin/dig/dig.c
index 711dedf430..76c491f073 100644
--- a/bin/dig/dig.c
+++ b/bin/dig/dig.c
@@ -2341,16 +2341,20 @@ preparse_args(int argc, char **argv) {
 			continue;
 		}
 		/* Look for dash value option. */
-		if (strpbrk(option, dash_opts) != &option[0] ||
-		    strlen(option) > 1U) {
-			/* Error or value in option. */
+		if (strpbrk(option, dash_opts) != &option[0]) {
+			goto invalid_option;
+		}
+		if (strlen(option) > 1U) {
+			/* value in option. */
 			continue;
 		}
 		/* Dash value is next argument so we need to skip it. */
 		rc--, rv++;
 		/* Handle missing argument */
 		if (rc == 0) {
-			break;
+		invalid_option:
+			fprintf(stderr, "Invalid option: -%s\n", option);
+			usage();
 		}
 	}
 }