diff --git a/wire/modules/Fieldtype/FieldtypeFile.module b/wire/modules/Fieldtype/FieldtypeFile.module
index cae511a9..651725c2 100644
--- a/wire/modules/Fieldtype/FieldtypeFile.module
+++ b/wire/modules/Fieldtype/FieldtypeFile.module
@@ -539,6 +539,7 @@ class FieldtypeFile extends FieldtypeMulti {
 		if($field->id && !($field->get('fileSchema') & self::fileSchemaFiledata)) {
 			// permanently add new 'filedata' column to schema
 			$addFiledata = false;
+			if($field->flags & Field::flagFieldgroupContext) $field = $this->wire('fields')->get($field->name);
 
 			try {
 				$query = $database->prepare("SHOW COLUMNS FROM `$table` WHERE Field='filedata'");
@@ -583,6 +584,7 @@ class FieldtypeFile extends FieldtypeMulti {
 		if($field->id && !($field->get('fileSchema') & self::fileSchemaDate)) {
 			// permanently add new 'modified' and 'created' column to file schema
 			$addDates = false;
+			if($field->flags & Field::flagFieldgroupContext) $field = $this->wire('fields')->get($field->name);
 
 			try {
 				$query = $database->prepare("SHOW COLUMNS FROM `$table` WHERE Field='modified'");