diff --git a/owncloudComLibrary/src/main/java/com/owncloud/android/lib/resources/files/UploadFileFromContentUriOperation.kt b/owncloudComLibrary/src/main/java/com/owncloud/android/lib/resources/files/UploadFileFromContentUriOperation.kt
index 75c031eb..e539e019 100644
--- a/owncloudComLibrary/src/main/java/com/owncloud/android/lib/resources/files/UploadFileFromContentUriOperation.kt
+++ b/owncloudComLibrary/src/main/java/com/owncloud/android/lib/resources/files/UploadFileFromContentUriOperation.kt
@@ -2,6 +2,7 @@ package com.owncloud.android.lib.resources.files
 
 import android.content.ContentResolver
 import android.net.Uri
+import android.provider.OpenableColumns
 import com.owncloud.android.lib.common.OwnCloudClient
 import com.owncloud.android.lib.common.http.HttpConstants
 import com.owncloud.android.lib.common.http.methods.webdav.PutMethod
@@ -59,6 +60,14 @@ class ContentUriRequestBody(
         return contentType.toMediaTypeOrNull()
     }
 
+    override fun contentLength(): Long {
+        contentResolver.query(contentUri, null, null, null, null)?.use { cursor ->
+            val sizeIndex = cursor.getColumnIndex(OpenableColumns.SIZE)
+            cursor.moveToFirst()
+            return cursor.getLong(sizeIndex)
+        } ?: return -1
+    }
+
     override fun writeTo(sink: BufferedSink) {
         val inputStream = contentResolver.openInputStream(contentUri)
             ?: throw IOException("Couldn't open content URI for reading: $contentUri")