diff --git a/gyrokinetic/apps/gk_species.c b/gyrokinetic/apps/gk_species.c
index 2b93be63c..873578b38 100644
--- a/gyrokinetic/apps/gk_species.c
+++ b/gyrokinetic/apps/gk_species.c
@@ -68,7 +68,7 @@ gk_species_omegaH_dt(gkyl_gyrokinetic_app *app, struct gk_species *gks, const st
       gk_fdot_multiplier_get_time_dilation_scale_const(app, &gks->fdot_mult);
 
     double omegaH = fabs(gks->info.charge)*sqrt(GKYL_MAX2(0.0,m0_max[0])/gks->info.mass)*app->omegaH_gf
-      * time_dilation_scale_const;
+      * time_dilation_scale_const * gks->collisionless.scale_fac;
 
     return omegaH > 1e-20? app->cfl_omegaH/omegaH : DBL_MAX;
   }