diff --git a/heracles/twopoint.py b/heracles/twopoint.py
index 5f7bd97..637bad5 100644
--- a/heracles/twopoint.py
+++ b/heracles/twopoint.py
@@ -465,7 +465,7 @@ def invert_mixing_matrix(
     return inv_M
 
 
-def apply_mixing_matrix(d, M, lmax=None):
+def apply_mixing_matrix(d, M):
     """
     Apply mixing matrix to the data Cl.
     Args:
@@ -476,10 +476,7 @@ def apply_mixing_matrix(d, M, lmax=None):
     """
     corr_d = {}
     for key in d.keys():
-        if lmax is None:
-            *_, lmax = d[key].shape
         dtype = d[key].array.dtype
-        ell_mask = M[key].ell
         s1, s2 = d[key].spin
         _d = np.atleast_2d(d[key].array)
         _M = M[key].array
@@ -495,7 +492,5 @@ def apply_mixing_matrix(d, M, lmax=None):
                 _corr_d.append(_M @ cl)
             _corr_d = np.squeeze(_corr_d)
         _corr_d = np.array(list(_corr_d), dtype=dtype)
-        corr_d[key] = replace(d[key], array=_corr_d, ell=ell_mask)
-    # truncate
-    corr_d = binned(corr_d, np.arange(0, lmax + 1))
+        corr_d[key] = replace(d[key], array=_corr_d)
     return corr_d