diff --git a/packages/babel-parser/src/tokenizer/index.js b/packages/babel-parser/src/tokenizer/index.js
index 524d05a694e9..b29621031f4a 100644
--- a/packages/babel-parser/src/tokenizer/index.js
+++ b/packages/babel-parser/src/tokenizer/index.js
@@ -21,7 +21,7 @@ import {
 import State from "./state";
 import type { LookaheadState } from "./state";
 
-const VALID_REGEX_FLAGS = new Set(["g", "m", "s", "i", "y", "u"]);
+const VALID_REGEX_FLAGS = new Set(["g", "m", "s", "i", "y", "u", "d"]);
 
 // The following character codes are forbidden from being
 // an immediate sibling of NumericLiteralSeparator _
diff --git a/packages/babel-parser/test/fixtures/es2022/regexp-match-indices/d-flag/input.js b/packages/babel-parser/test/fixtures/es2022/regexp-match-indices/d-flag/input.js
new file mode 100644
index 000000000000..566fb6f0e726
--- /dev/null
+++ b/packages/babel-parser/test/fixtures/es2022/regexp-match-indices/d-flag/input.js
@@ -0,0 +1 @@
+/./d;
diff --git a/packages/babel-parser/test/fixtures/es2022/regexp-match-indices/d-flag/output.json b/packages/babel-parser/test/fixtures/es2022/regexp-match-indices/d-flag/output.json
new file mode 100644
index 000000000000..09974d1dc043
--- /dev/null
+++ b/packages/babel-parser/test/fixtures/es2022/regexp-match-indices/d-flag/output.json
@@ -0,0 +1,26 @@
+{
+  "type": "File",
+  "start":0,"end":5,"loc":{"start":{"line":1,"column":0},"end":{"line":1,"column":5}},
+  "program": {
+    "type": "Program",
+    "start":0,"end":5,"loc":{"start":{"line":1,"column":0},"end":{"line":1,"column":5}},
+    "sourceType": "script",
+    "interpreter": null,
+    "body": [
+      {
+        "type": "ExpressionStatement",
+        "start":0,"end":5,"loc":{"start":{"line":1,"column":0},"end":{"line":1,"column":5}},
+        "expression": {
+          "type": "RegExpLiteral",
+          "start":0,"end":4,"loc":{"start":{"line":1,"column":0},"end":{"line":1,"column":4}},
+          "extra": {
+            "raw": "/./d"
+          },
+          "pattern": ".",
+          "flags": "d"
+        }
+      }
+    ],
+    "directives": []
+  }
+}