diff --git a/weed/command/filer_sync.go b/weed/command/filer_sync.go
index c246f6b74..90204af4a 100644
--- a/weed/command/filer_sync.go
+++ b/weed/command/filer_sync.go
@@ -474,14 +474,14 @@ func genProcessFunction(sourcePath string, targetPath string, excludePaths []str
 				}
 
 			} else {
-				// new key is outside of the watched directory
+				// new key is outside the watched directory
 				if doDeleteFiles {
 					key := buildKey(dataSink, message, targetPath, sourceOldKey, sourcePath)
 					return dataSink.DeleteEntry(key, message.OldEntry.IsDirectory, message.DeleteChunks, message.Signatures)
 				}
 			}
 		} else {
-			// old key is outside of the watched directory
+			// old key is outside the watched directory
 			if strings.HasPrefix(string(sourceNewKey), sourcePath) {
 				// new key is in the watched directory
 				key := buildKey(dataSink, message, targetPath, sourceNewKey, sourcePath)
@@ -491,7 +491,7 @@ func genProcessFunction(sourcePath string, targetPath string, excludePaths []str
 					return nil
 				}
 			} else {
-				// new key is also outside of the watched directory
+				// new key is also outside the watched directory
 				// skip
 			}
 		}