diff --git a/std/flags/mod.ts b/std/flags/mod.ts
index 09b5afa8ae..05aeff6f22 100644
--- a/std/flags/mod.ts
+++ b/std/flags/mod.ts
@@ -277,7 +277,7 @@ export function parse(
         }
 
         if (/[A-Za-z]/.test(letters[j]) && /=/.test(next)) {
-          setArg(letters[j], next.split("=")[1], arg);
+          setArg(letters[j], next.split(/=(.+)/)[1], arg);
           broken = true;
           break;
         }
diff --git a/std/flags/parse_test.ts b/std/flags/parse_test.ts
index 9a19e5634c..3e981a43a9 100755
--- a/std/flags/parse_test.ts
+++ b/std/flags/parse_test.ts
@@ -26,6 +26,9 @@ Deno.test("comprehensive", function (): void {
       "--bool",
       "--no-meep",
       "--multi=baz",
+      "-f=abc=def",
+      "--foo=---=\\n--+34-=/=",
+      "-e==",
       "--",
       "--not-a-flag",
       "eek",
@@ -34,6 +37,9 @@ Deno.test("comprehensive", function (): void {
       c: true,
       a: true,
       t: true,
+      e: "=",
+      f: "abc=def",
+      foo: "---=\\n--+34-=/=",
       s: "woo",
       h: "awesome",
       b: true,