diff --git a/vskernels/kernels/complex.py b/vskernels/kernels/complex.py
index a13093c..36a8a8c 100644
--- a/vskernels/kernels/complex.py
+++ b/vskernels/kernels/complex.py
@@ -56,7 +56,7 @@ def scale(  # type: ignore[override]
         ) -> vs.VideoNode:
             ...
     else:
-        scale = _BaseLinearOperation._linear_op('scale')
+        scale = inject_self.cached(_BaseLinearOperation._linear_op('scale'))
 
 
 class LinearDescaler(_BaseLinearOperation, Descaler):
@@ -68,7 +68,7 @@ def descale(  # type: ignore[override]
         ) -> vs.VideoNode:
             ...
     else:
-        descale = _BaseLinearOperation._linear_op('descale')
+        descale = inject_self.cached(_BaseLinearOperation._linear_op('descale'))
 
 
 class KeepArScaler(Scaler):