diff --git a/irrep.jl b/irrep.jl
index 3b45082..293b1fd 100644
--- a/irrep.jl
+++ b/irrep.jl
@@ -55,9 +55,9 @@ function sym_reduce(s, K_partial)
 
     for (i, label) in enumerate(s.labels)
         if i != label
-            K_partial_x2[:, i] .+= K_partial_x2[:, label]
-            K_partial_y2[:, i] .+= K_partial_y2[:, label]
-            K_partial_z2[:, i] .+= K_partial_z2[:, label]
+            K_partial_x2[:, label] .+= K_partial_x2[:, i]
+            K_partial_y2[:, label] .+= K_partial_y2[:, i]
+            K_partial_z2[:, label] .+= K_partial_z2[:, i]
         end
     end