diff --git a/sharedComponents/schema2jsonld/service/open-aire-jsonld-converter.service.ts b/sharedComponents/schema2jsonld/service/open-aire-jsonld-converter.service.ts
index 24eb9d8e..2d52b9f9 100644
--- a/sharedComponents/schema2jsonld/service/open-aire-jsonld-converter.service.ts
+++ b/sharedComponents/schema2jsonld/service/open-aire-jsonld-converter.service.ts
@@ -196,8 +196,8 @@ convertDatasource(datasource: any, URL, otherUrl): Organization {
 	private getDescription(result: any): String[] {
 		const item = _.get(result, "result.metadata.oaf:entity.oaf:result.description", null);
 		if (!item) return this.getTitle(result);
-		let descr = Array.isArray(item) ? item[0]:item;
-		return [(descr.substring(0,4997)+(descr.substring(0,4997).length == 4997?'...':'')) as String];
+		let descr = Array.isArray(item) ? item[0]:item + ""; //  +""  to make string: if description is number descr.substring returns error
+		return [descr?(descr.substring(0,4997)+(descr.substring(0,4997).length == 4997?'...':'')):"" as String];
 	}
 
 	private getDateCreated(result: any): String[] {