diff --git a/src/parser.pegjs b/src/parser.pegjs
index 04376e9f..2e5e2ce6 100644
--- a/src/parser.pegjs
+++ b/src/parser.pegjs
@@ -9589,6 +9589,7 @@ __hspace__
 // Comments
 comment
   = line_comment
+  / &only_postgres x:psql_restrict_command { return x; }
   / conditional_comment
   / !postgres x:pound_sign_comment { return x; }
   / !postgres x:block_comment { return x; }
@@ -9631,6 +9632,14 @@ line_comment
     });
   }
 
+psql_restrict_command
+  = "\\" ("restrict " / "unrestrict ") (!end_of_line .)* {
+    return loc({
+      type: "line_comment",
+      text: text(),
+    });
+  }
+
 pound_sign_comment
   = "#" (!end_of_line .)* {
     return loc({
diff --git a/test/whitespace.test.ts b/test/whitespace.test.ts
index 527f2908..6e7c816a 100644
--- a/test/whitespace.test.ts
+++ b/test/whitespace.test.ts
@@ -179,6 +179,13 @@ describe("whitespace", () => {
       test("SELECT 1 + -- comment 1\n -- comment 2\n 2");
     });
 
+    dialect("postgresql", () => {
+      it("parses pg_dump restrict commands", () => {
+        const key = "aB3".repeat(21); // 63 alphanumeric characters
+        test(`\\restrict ${key}\nSELECT 1;\n\\unrestrict ${key}\n`);
+      });
+    });
+
     dialect(["bigquery", "sqlite", "mysql", "mariadb"], () => {
       it("parses hash comments", () => {
         test("SELECT 1 + # comment 1\n # comment 2\n 2");