diff --git a/core/jni/android_backup_BackupDataOutput.cpp b/core/jni/android_backup_BackupDataOutput.cpp
index d02590e..ce30aaa8 100644
--- a/core/jni/android_backup_BackupDataOutput.cpp
+++ b/core/jni/android_backup_BackupDataOutput.cpp
@@ -70,7 +70,7 @@
     int err;
     BackupDataWriter* writer = (BackupDataWriter*)w;
 
-    if (env->GetArrayLength(data) > size) {
+    if (env->GetArrayLength(data) < size) {
         // size mismatch
         return -1;
     }