diff --git a/owncloudComLibrary/src/main/java/com/owncloud/android/lib/resources/files/UploadFileFromFileSystemOperation.kt b/owncloudComLibrary/src/main/java/com/owncloud/android/lib/resources/files/UploadFileFromFileSystemOperation.kt
index e532c678..4a32403d 100644
--- a/owncloudComLibrary/src/main/java/com/owncloud/android/lib/resources/files/UploadFileFromFileSystemOperation.kt
+++ b/owncloudComLibrary/src/main/java/com/owncloud/android/lib/resources/files/UploadFileFromFileSystemOperation.kt
@@ -55,7 +55,7 @@ open class UploadFileFromFileSystemOperation(
     val remotePath: String,
     val mimeType: String,
     val lastModifiedTimestamp: String,
-    val requiredEtag: String,
+    val requiredEtag: String?,
 ) : RemoteOperation<Unit>() {
 
     protected val cancellationRequested = AtomicBoolean(false)
@@ -98,7 +98,7 @@ open class UploadFileFromFileSystemOperation(
 
         putMethod = PutMethod(URL(client.userFilesWebDavUri.toString() + WebdavUtils.encodePath(remotePath)), fileRequestBody!!).apply {
             setRetryOnConnectionFailure(false)
-            if (requiredEtag.isNotBlank()) {
+            if (!requiredEtag.isNullOrBlank()) {
                 addRequestHeader(HttpConstants.IF_MATCH_HEADER, requiredEtag)
             }
             addRequestHeader(HttpConstants.OC_TOTAL_LENGTH_HEADER, fileToUpload.length().toString())
diff --git a/owncloudComLibrary/src/main/java/com/owncloud/android/lib/resources/files/chunks/ChunkedUploadFromFileSystemOperation.kt b/owncloudComLibrary/src/main/java/com/owncloud/android/lib/resources/files/chunks/ChunkedUploadFromFileSystemOperation.kt
index cc42b6bf..a7268123 100644
--- a/owncloudComLibrary/src/main/java/com/owncloud/android/lib/resources/files/chunks/ChunkedUploadFromFileSystemOperation.kt
+++ b/owncloudComLibrary/src/main/java/com/owncloud/android/lib/resources/files/chunks/ChunkedUploadFromFileSystemOperation.kt
@@ -54,7 +54,7 @@ class ChunkedUploadFromFileSystemOperation(
     remotePath: String,
     mimeType: String,
     lastModifiedTimestamp: String,
-    requiredEtag: String,
+    requiredEtag: String?,
 ) : UploadFileFromFileSystemOperation(
     localPath = localPath,
     remotePath = remotePath,