diff --git a/developer/src/kmc-convert/src/keylayout-to-kmn/kmn-file-writer.ts b/developer/src/kmc-convert/src/keylayout-to-kmn/kmn-file-writer.ts
index 7c8f5800bc..eb92f3a797 100644
--- a/developer/src/kmc-convert/src/keylayout-to-kmn/kmn-file-writer.ts
+++ b/developer/src/kmc-convert/src/keylayout-to-kmn/kmn-file-writer.ts
@@ -1673,7 +1673,7 @@ export class KmnFileWriter {
 
     // add a warning message
     if (msg !== "") {
-      msg = msg + msg_control + msg_entity;
+      msg = msg + "; " + msg_control + msg_entity;
     }
     if ((msg === "") && (msg_entity !== "" || msg_control !== "")) {
       msg = "c WARNING: " + msg_entity + msg_control;
diff --git a/developer/src/kmc-convert/test/kmn-file-writer.tests.ts b/developer/src/kmc-convert/test/kmn-file-writer.tests.ts
index baabf277da..bd93bbdeba 100644
--- a/developer/src/kmc-convert/test/kmn-file-writer.tests.ts
+++ b/developer/src/kmc-convert/test/kmn-file-writer.tests.ts
@@ -137,7 +137,7 @@ describe('KmnFileWriter', function () {
       ["", "U+0006", "Msg; Use of a control character "],
     ].forEach(function (values) {
       it(('should convert "' + values[0] + '"').padEnd(25, " ") + 'to "' + values[1] + '"', async function () {
-        const result = sutW.writeCharacterOrUnicode(values[0] as string, "Msg; ");
+        const result = sutW.writeCharacterOrUnicode(values[0] as string, "Msg");
         assert.isNotNull(result);
         assert.equal(result.character, values[1]);
         assert.equal(result.message, values[2]);