diff --git a/pyFAI/ext/_geometry.pyx b/pyFAI/ext/_geometry.pyx
index d41fd9fe9..03bd29f64 100644
--- a/pyFAI/ext/_geometry.pyx
+++ b/pyFAI/ext/_geometry.pyx
@@ -28,12 +28,12 @@
 
 __author__ = "Jerome Kieffer"
 __license__ = "MIT"
-__date__ = "05/04/2018"
+__date__ = "26/10/2018"
 __copyright__ = "2011-2016, ESRF"
 __contact__ = "jerome.kieffer@esrf.fr"
 
 
-import cython
+cimport cython
 cimport numpy
 import numpy
 from cython.parallel cimport prange
diff --git a/pyFAI/ext/bilinear.pxi b/pyFAI/ext/bilinear.pxi
index 4435f389b..2b97c3183 100644
--- a/pyFAI/ext/bilinear.pxi
+++ b/pyFAI/ext/bilinear.pxi
@@ -25,6 +25,7 @@
 #  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 #  THE SOFTWARE.
 
+cimport cython 
 from libc.math cimport floor, ceil
 import logging
 logger = logging.getLogger("bilinear")
diff --git a/pyFAI/ext/inpainting.pyx b/pyFAI/ext/inpainting.pyx
index aa73ce0ce..f79bb8bbf 100644
--- a/pyFAI/ext/inpainting.pyx
+++ b/pyFAI/ext/inpainting.pyx
@@ -29,11 +29,11 @@
 Simple Cython module for doing CRC32 for checksums, possibly with SSE4 acceleration
 """
 __author__ = "Jérôme Kieffer"
-__date__ = "18/12/2017"
+__date__ = "26/10/2018"
 __contact__ = "Jerome.kieffer@esrf.fr"
 __license__ = "MIT"
 
-import cython
+from cython cimport floating 
 cimport numpy
 import numpy
 from libc.math cimport floor, ceil
@@ -69,11 +69,11 @@ def largest_width(numpy.int8_t[:, :]image):
 
 def polar_interpolate(data,
                       numpy.int8_t[:, ::1] mask,
-                      cython.floating[:, ::1] radial,
-                      cython.floating[:, ::1] azimuthal,
+                      floating[:, ::1] radial,
+                      floating[:, ::1] azimuthal,
                       polar,
-                      cython.floating[::1] rad_pos,
-                      cython.floating[::1] azim_pos
+                      floating[::1] rad_pos,
+                      floating[::1] azim_pos
                       ):
     """Perform the bilinear interpolation from polar data into the initial array
     data
@@ -125,7 +125,7 @@ def polar_interpolate(data,
     return numpy.asarray(cdata)
 
 
-def polar_inpaint(cython.floating[:, :] img not None,
+def polar_inpaint(floating[:, :] img not None,
                   numpy.int8_t[:, :] topaint not None,
                   numpy.int8_t[:, :] mask=None,
                   empty=None):
diff --git a/pyFAI/ext/splitBBox.pyx b/pyFAI/ext/splitBBox.pyx
index 9bcbd2c3e..02eda7f96 100644
--- a/pyFAI/ext/splitBBox.pyx
+++ b/pyFAI/ext/splitBBox.pyx
@@ -31,7 +31,7 @@ Splitting is done on the pixel's bounding box similar to fit2D
 """
 __author__ = "Jerome Kieffer"
 __contact__ = "Jerome.kieffer@esrf.fr"
-__date__ = "07/09/2018"
+__date__ = "26/10/2018"
 __status__ = "stable"
 __license__ = "MIT"
 
@@ -180,8 +180,8 @@ def histoBBox1d(numpy.ndarray weights not None,
         assert pos1.size == size, "pos1.size == size"
         assert delta_pos1.size == size, "delta_pos1.size == size"
         check_pos1 = 1
-        cpos1 = numpy.ascontiguousarray(pos1.ravel(), dtype=numpy.float32)
-        dpos1 = numpy.ascontiguousarray(delta_pos1.ravel(), dtype=numpy.float32)
+        cpos1 = numpy.ascontiguousarray(pos1.ravel(), dtype=position_d)
+        dpos1 = numpy.ascontiguousarray(delta_pos1.ravel(), dtype=position_d)
         pos1_min = min(pos1Range)
         pos1_maxin = max(pos1Range)
         pos1_max = calc_upper_bound(pos1_maxin)
diff --git a/pyFAI/ext/splitPixel.pyx b/pyFAI/ext/splitPixel.pyx
index f3e00b923..7c9c69d14 100644
--- a/pyFAI/ext/splitPixel.pyx
+++ b/pyFAI/ext/splitPixel.pyx
@@ -33,12 +33,12 @@ Histogram (direct) implementation
 
 __author__ = "Jerome Kieffer"
 __contact__ = "Jerome.kieffer@esrf.fr"
-__date__ = "18/10/2018"
+__date__ = "26/10/2018"
 __status__ = "stable"
 __license__ = "MIT"
 
-import cython
-from cython import floating
+cimport cython
+from cython cimport floating
 cimport numpy
 import numpy
 from libc.math cimport fabs, ceil, floor