diff --git a/hexrd/instrument/detector.py b/hexrd/instrument/detector.py
index 0f84f7ea..7ad0d2e6 100644
--- a/hexrd/instrument/detector.py
+++ b/hexrd/instrument/detector.py
@@ -24,16 +24,13 @@
     make_rmat_of_expmap,
     oscill_angles_of_hkls,
     mapAngle,
-    anglesToDVec,
+    angles_to_dvec,
 )
 
 from hexrd.utils.decorators import memoize
 from hexrd.gridutil import cellIndices
 from hexrd.instrument import detector_coatings
 
-if ct.USE_NUMBA:
-    import numba
-
 distortion_registry = distortion_pkg.Registry()
 
 max_workers_DFLT = max(1, os.cpu_count() - 1)
@@ -1736,7 +1733,7 @@ def calc_physics_package_transmission(self, energy, rMat_s, physics_package):
         angs = np.vstack((tth.flatten(), eta.flatten(),
                           np.zeros(tth.flatten().shape))).T
 
-        dvecs = anglesToDVec(angs, bHat_l=bvec)
+        dvecs = angles_to_dvec(angs, bHat_l=bvec)
 
         secb = np.abs(1./np.dot(dvecs, sample_normal).reshape(self.shape))
 
@@ -1769,7 +1766,7 @@ def calc_effective_pinhole_area(self, physics_package):
         tth, eta = self.pixel_angles()
         angs = np.vstack((tth.flatten(), eta.flatten(),
                   np.zeros(tth.flatten().shape))).T
-        dvecs = anglesToDVec(angs, bHat_l=bvec)
+        dvecs = angles_to_dvec(angs, bHat_l=bvec)
 
         cth = -dvecs[:,2].reshape(self.shape)
         tanth = np.tan(np.arccos(cth))
diff --git a/hexrd/instrument/planar_detector.py b/hexrd/instrument/planar_detector.py
index a04344cd..24e93861 100644
--- a/hexrd/instrument/planar_detector.py
+++ b/hexrd/instrument/planar_detector.py
@@ -6,7 +6,7 @@
     xy_to_gvec,
     gvec_to_xy,
     make_beam_rmat,
-    anglesToDVec,
+    angles_to_dvec,
 )
 from hexrd.utils.decorators import memoize
 
@@ -134,7 +134,7 @@ def calc_filter_coating_transmission(self, energy):
         angs = np.vstack((tth.flatten(), eta.flatten(),
                           np.zeros(tth.flatten().shape))).T
 
-        dvecs = anglesToDVec(angs, bHat_l=bvec)
+        dvecs = angles_to_dvec(angs, bHat_l=bvec)
 
         secb = 1./np.dot(dvecs, det_normal).reshape(self.shape)