diff --git a/meanas/fdfd/waveguide_mode.py b/meanas/fdfd/waveguide_mode.py
index 6bdbc73..e94429f 100644
--- a/meanas/fdfd/waveguide_mode.py
+++ b/meanas/fdfd/waveguide_mode.py
@@ -220,7 +220,7 @@ def compute_overlap_e(E: field_t,
     Etgt[slices2] = Ee[slices2]
 
     Etgt /= (Etgt.conj() * Etgt).sum()
-    return Etgt.conj()
+    return Etgt
 
 
 def solve_waveguide_mode_cylindrical(mode_number: int,