diff --git a/src/py/libcamera/utils/MappedFrameBuffer.py b/src/py/libcamera/utils/MappedFrameBuffer.py
index c300a6d7..329e51fa 100644
--- a/src/py/libcamera/utils/MappedFrameBuffer.py
+++ b/src/py/libcamera/utils/MappedFrameBuffer.py
@@ -99,3 +99,7 @@ class MappedFrameBuffer:
             raise RuntimeError('MappedFrameBuffer not mmapped')
 
         return self.__planes
+
+    @property
+    def fb(self):
+        return self.__fb