diff --git a/mahotas/features/texture.py b/mahotas/features/texture.py
index d2a1c522..d2dc5d4b 100644
--- a/mahotas/features/texture.py
+++ b/mahotas/features/texture.py
@@ -132,7 +132,7 @@ def haralick(f,
         nr_dirs = len(_3d_deltas)
     else:
         raise ValueError('mahotas.texture.haralick: Can only handle 2D and 3D images.')
-    fm1 = f.max() + 1
+    fm1 = int(f.max()) + 1
     cmat = np.empty((fm1, fm1), np.int32)
     def all_cmatrices():
         for dir in range(nr_dirs):
diff --git a/mahotas/tests/test_texture.py b/mahotas/tests/test_texture.py
index 51c616fc..621bc776 100644
--- a/mahotas/tests/test_texture.py
+++ b/mahotas/tests/test_texture.py
@@ -171,6 +171,7 @@ def test_4d_image():
 def rand_haralick():
     f = 255*np.random.random((128,128))
     f = f.astype(np.uint8)
+    f[0, 0] = 255
     f = mh.features.haralick(f)
     return f.mean(0)
 def test_feature_non_zero():