diff --git a/hexrd/fitgrains.py b/hexrd/fitgrains.py
index caa2a7e3..ceaa9e4a 100644
--- a/hexrd/fitgrains.py
+++ b/hexrd/fitgrains.py
@@ -216,7 +216,8 @@ def fit_grain_FF_reduced(grain_id):
         else:
             grain_params = fitGrain(
                     grain_params, instrument, culled_results,
-                    plane_data.latVecOps['B'], plane_data.wavelength
+                    plane_data.latVecOps['B'], plane_data.wavelength,
+                    omePeriod=ome_period,
                 )
             # get chisq
             # TODO: do this while evaluating fit???
@@ -289,7 +290,8 @@ def fit_grain_FF_reduced(grain_id):
         if num_refl_valid > 12:
             grain_params = fitGrain(
                 grain_params, instrument, culled_results_r,
-                plane_data.latVecOps['B'], plane_data.wavelength
+                plane_data.latVecOps['B'], plane_data.wavelength,
+                omePeriod=ome_period,
             )
             # get chisq
             # TODO: do this while evaluating fit???
diff --git a/hexrd/fitting/grains.py b/hexrd/fitting/grains.py
index 37169f79..9a394776 100644
--- a/hexrd/fitting/grains.py
+++ b/hexrd/fitting/grains.py
@@ -74,11 +74,6 @@ def fitGrain(gFull, instrument, reflections_dict,
         DESCRIPTION.
 
     """
-    # FIXME: will currently fail if omePeriod is specifed
-    if omePeriod is not None:
-        # xyo_det[:, 2] = rotations.mapAngle(xyo_det[:, 2], omePeriod)
-        raise RuntimeError
-
     gFit = gFull[gFlag]
 
     # objFuncFitGrain can run *significantly* faster if we convert the