diff --git a/src/file/table-of-contents/field-instruction.ts b/src/file/table-of-contents/field-instruction.ts
index 7194cf3f16..09f5129613 100644
--- a/src/file/table-of-contents/field-instruction.ts
+++ b/src/file/table-of-contents/field-instruction.ts
@@ -56,7 +56,7 @@ export class FieldInstruction extends XmlComponent {
             instruction = `${instruction} \\s "${this.properties.seqFieldIdentifierForPrefix}"`;
         }
         if (this.properties.stylesWithLevels && this.properties.stylesWithLevels.length) {
-            const styles = this.properties.stylesWithLevels.map((sl) => `${sl.styleName},${sl.level}`).join(",");
+            const styles = this.properties.stylesWithLevels.map((sl) => `${sl.styleName};${sl.level}`).join(";");
             instruction = `${instruction} \\t "${styles}"`;
         }
         if (this.properties.useAppliedParagraphOutlineLevel) {