diff --git a/android/src/main/java/com/rnfs/RNFSManager.java b/android/src/main/java/com/rnfs/RNFSManager.java
index 351ac066..83a557bc 100755
--- a/android/src/main/java/com/rnfs/RNFSManager.java
+++ b/android/src/main/java/com/rnfs/RNFSManager.java
@@ -975,7 +975,7 @@ private void reject(Promise promise, String filepath, Exception ex) {
       return;
     }
 
-    promise.reject(null, ex.getMessage());
+    promise.reject("RNFS_GENERIC_ERROR", ex != null ? ex.getMessage() : "File system error");
   }
 
   private void rejectFileNotFound(Promise promise, String filepath) {