diff --git a/components/lib/fileupload/FileContent.vue b/components/lib/fileupload/FileContent.vue
index ce4f04895..1f086ac9e 100644
--- a/components/lib/fileupload/FileContent.vue
+++ b/components/lib/fileupload/FileContent.vue
@@ -54,7 +54,7 @@ export default {
         formatSize(bytes) {
             const k = 1024;
             const dm = 3;
-            const sizes = this.$primevue.config.locale?.fileSizeTypes;
+            const sizes = this.$primevue.config.locale?.fileSizeTypes || ['B', 'KB', 'MB', 'GB', 'TB', 'PB', 'EB', 'ZB', 'YB'];
 
             if (bytes === 0) {
                 return `0 ${sizes[0]}`;
diff --git a/components/lib/fileupload/FileUpload.vue b/components/lib/fileupload/FileUpload.vue
index 5f2c19e5a..6412221aa 100755
--- a/components/lib/fileupload/FileUpload.vue
+++ b/components/lib/fileupload/FileUpload.vue
@@ -328,7 +328,7 @@ export default {
         formatSize(bytes) {
             const k = 1024;
             const dm = 3;
-            const sizes = this.$primevue.config.locale?.fileSizeTypes;
+            const sizes = this.$primevue.config.locale?.fileSizeTypes || ['B', 'KB', 'MB', 'GB', 'TB', 'PB', 'EB', 'ZB', 'YB'];
 
             if (bytes === 0) {
                 return `0 ${sizes[0]}`;