diff --git a/lib/core/pipes/file-size.pipe.spec.ts b/lib/core/pipes/file-size.pipe.spec.ts
index ef8e4ddbf9..0c06687ab3 100644
--- a/lib/core/pipes/file-size.pipe.spec.ts
+++ b/lib/core/pipes/file-size.pipe.spec.ts
@@ -44,6 +44,7 @@ describe('FileSizePipe', () => {
     it('returns empty string with invalid input', () => {
         expect(pipe.transform(null)).toBe('');
         expect(pipe.transform(undefined)).toBe('');
+        expect(pipe.transform(NaN)).toBe('');
     });
 
     it('should convert value to Bytes', () => {
diff --git a/lib/core/pipes/file-size.pipe.ts b/lib/core/pipes/file-size.pipe.ts
index 2586ad350d..38351d8f0c 100644
--- a/lib/core/pipes/file-size.pipe.ts
+++ b/lib/core/pipes/file-size.pipe.ts
@@ -27,8 +27,13 @@ export class FileSizePipe implements PipeTransform {
     constructor(private translation: TranslationService) {
     }
 
-    transform(bytes: number, decimals: number = 2): string {
-        if (bytes == null) {
+    transform(paramByte: any, decimals: number = 2): string {
+        if (paramByte == null) {
+            return '';
+        }
+
+        const bytes = parseInt(paramByte, 10);
+        if (isNaN(bytes)) {
             return '';
         }