diff --git a/changelog_unreleased/less/14007.md b/changelog_unreleased/less/14007.md
new file mode 100644
index 000000000..eed8b756d
--- /dev/null
+++ b/changelog_unreleased/less/14007.md
@@ -0,0 +1,19 @@
+#### Fix semicolon duplicated at the end of LESS file (#14007 by @mvorisek)
+
+<!-- prettier-ignore -->
+```less
+// Input
+@variable: {
+  field: something;
+};
+
+// Prettier stable
+@variable: {
+  field: something;
+}; ;
+
+// Prettier main
+@variable: {
+  field: something;
+};
+```
diff --git a/src/language-css/printer-postcss.js b/src/language-css/printer-postcss.js
index a15f7981f..d9894d4ce 100644
--- a/src/language-css/printer-postcss.js
+++ b/src/language-css/printer-postcss.js
@@ -101,7 +101,10 @@ function genericPrint(path, options, print) {
       return [node.raw, hardline];
     case "css-root": {
       const nodes = printNodeSequence(path, options, print);
-      const after = node.raws.after.trim();
+      let after = node.raws.after.trim();
+      if (after.startsWith(";")) {
+        after = after.slice(1).trim();
+      }
 
       return [
         nodes,
diff --git a/tests/format/less/less/__snapshots__/jsfmt.spec.js.snap b/tests/format/less/less/__snapshots__/jsfmt.spec.js.snap
index f52a92aa2..1541bb049 100644
--- a/tests/format/less/less/__snapshots__/jsfmt.spec.js.snap
+++ b/tests/format/less/less/__snapshots__/jsfmt.spec.js.snap
@@ -83,6 +83,24 @@ a: b;
 ================================================================================
 `;
 
+exports[`issue-11483--never-append-anything.less format 1`] = `
+====================================options=====================================
+parsers: ["less"]
+printWidth: 80
+                                                                                | printWidth
+=====================================input======================================
+@variable: {
+  field: something;
+};
+
+=====================================output=====================================
+@variable: {
+  field: something;
+};
+
+================================================================================
+`;
+
 exports[`less.less format 1`] = `
 ====================================options=====================================
 parsers: ["less"]
diff --git a/tests/format/less/less/issue-11483--never-append-anything.less b/tests/format/less/less/issue-11483--never-append-anything.less
new file mode 100644
index 000000000..c0fbaa614
--- /dev/null
+++ b/tests/format/less/less/issue-11483--never-append-anything.less
@@ -0,0 +1,3 @@
+@variable: {
+  field: something;
+};