diff --git a/postpic/datareader/smileih5.py b/postpic/datareader/smileih5.py
index e0a4a7c..b2cf68d 100644
--- a/postpic/datareader/smileih5.py
+++ b/postpic/datareader/smileih5.py
@@ -216,9 +216,14 @@ def _getExpanded(self, key, theta=0):
 
             field_name = key+"_mode_"+str(mode)
             field_array = np.array(self._data[field_name])
-            field_array_shape = field_array.shape
-            reshaped_array = field_array.reshape(field_array_shape[0], field_array_shape[1]//2, 2)
-            complex_array = reshaped_array[:, :, 0] + 1j * reshaped_array[:, :, 1]
+            # The Envelope Fields are real without imaginary part.
+            if key.startswith('Env_'):
+                complex_array = field_array
+            else:
+                field_array_shape = field_array.shape
+                reshaped_array = field_array.reshape(field_array_shape[0],
+                                                     field_array_shape[1]//2, 2)
+                complex_array = reshaped_array[:, :, 0] + 1j * reshaped_array[:, :, 1]
             array_list.append(complex_array)
 
         # Modified array of shape (Nmodes, Nx, Nr)