diff --git a/biogeophys/FatesPlantHydraulicsMod.F90 b/biogeophys/FatesPlantHydraulicsMod.F90
index b38d58a2d3..dadfe65391 100644
--- a/biogeophys/FatesPlantHydraulicsMod.F90
+++ b/biogeophys/FatesPlantHydraulicsMod.F90
@@ -4370,7 +4370,7 @@ function zeng2001_crootfr(a, b, z, z_max) result(crootfr)
 
     if(present(z_max))then
        ! If the soil depth is larger than the maximum rooting depth of the cohort, 
-       ! then the cumulative root frection of that layer equals that of the maximum rooting depth  
+       ! then the cumulative root fraction of that layer equals that of the maximum rooting depth  
        crootfr      = 1._r8 - .5_r8*(exp(-a*min(z,z_max)) + exp(-b*min(z,z_max)))     
        ! end of Junyan addition
        crootfr_max = 1._r8 - .5_r8*(exp(-a*z_max) + exp(-b*z_max))