diff --git a/mat73/__init__.py b/mat73/__init__.py
index 50a5ca4..2c65873 100644
--- a/mat73/__init__.py
+++ b/mat73/__init__.py
@@ -112,7 +112,13 @@ def convert_mat(self, dataset):
             return None
         # complex numbers need to be filtered out separately
         elif 'imag' in str(dataset.dtype):
-            return np.array(dataset, np.complex).T.squeeze()
+            if dataset.attrs['MATLAB_class']==b'single':
+                dtype = np.complex64 
+            else:
+                dtype = np.complex128
+            arr = np.array(dataset)
+            arr = (arr['real'] + arr['imag']*1j).astype(dtype)
+            return arr.T.squeeze()
         # if it is none of the above, we can convert to numpy array
         elif mtype in ('double', 'single', 'int8', 'int16', 'int32', 'int64', 
                        'uint8', 'uint16', 'uint32', 'uint64'): 
diff --git a/setup.py b/setup.py
index 67f9159..51e0db1 100644
--- a/setup.py
+++ b/setup.py
@@ -4,14 +4,14 @@
     
 setuptools.setup(
      name='mat73',  
-     version='0.39',
+     version='0.40',
      author="skjerns",
      author_email="nomail@nomail.com",
      description="Load MATLAB .mat 7.3 into Python native data types",
      long_description=long_description,
    long_description_content_type="text/markdown",
      url="https://github.com/skjerns/mat7.3",
-     download_url="https://github.com/skjerns/mat7.3/archive/v.039.tar.gz",
+     download_url="https://github.com/skjerns/mat7.3/archive/v.040.tar.gz",
      install_requires=['h5py', 'numpy'],
      license='GNU 2.0',
      packages=['mat73'],
diff --git a/tests/test_mat73.py b/tests/test_mat73.py
index 08182d5..69cfa0b 100644
--- a/tests/test_mat73.py
+++ b/tests/test_mat73.py
@@ -70,7 +70,6 @@ def test_file1(self):
         np.testing.assert_array_equal(data['struct_']['test'],[1,2,3,4])
         assert len(data['struct2_'])==3
         
-        
     def test_file2(self):
         d = mat73.loadmat('testfile2.mat')
         raw1 = d['raw1']
@@ -78,6 +77,19 @@ def test_file2(self):
         assert raw1.speakerType == ['main']*5
         np.testing.assert_array_equal(raw1.channel,[1,2,3,4,5])
         np.testing.assert_allclose(raw1.measGain,[-1.0160217,-0.70729065,-1.2158508,0.68839645,2.464653])
+        for i in range(5):
+            assert np.isclose(np.sum(raw1.h[i]),-0.0007341067459898744)
+    
+        np.testing.assert_array_almost_equal(raw1.HSmooth[0][2], [ 0.001139-4.233492e-04j,  0.00068 +8.927040e-06j,
+        0.002382-7.647651e-04j, -0.012677+3.767829e-03j])
+        
+    def test_file3(self):
+        d = mat73.loadmat('testfile3.mat')
+        raw1 = d['raw1']
+        assert raw1.label == ['']*5
+        assert raw1.speakerType == ['main']*5
+        np.testing.assert_array_equal(raw1.channel,[1,2,3,4,5])
+        np.testing.assert_allclose(raw1.measGain,[-1.0160217,-0.70729065,-1.2158508,0.68839645,2.464653])
         for i in range(5):
             assert np.isclose(np.sum(raw1.h[i]),-0.019355850366449)
         for i in range(5):
diff --git a/tests/testfile2.mat b/tests/testfile2.mat
index 9f1bcef..f0d04bc 100644
Binary files a/tests/testfile2.mat and b/tests/testfile2.mat differ
diff --git a/tests/testfile3.mat b/tests/testfile3.mat
new file mode 100644
index 0000000..9f1bcef
Binary files /dev/null and b/tests/testfile3.mat differ