diff --git a/src/input_xml.F90 b/src/input_xml.F90
index 8b01b20f1f..a9c7618429 100644
--- a/src/input_xml.F90
+++ b/src/input_xml.F90
@@ -1737,14 +1737,15 @@ contains
         end if
 
         ! Check enforced isotropic lab scattering
-        if (check_for_node(node_nuc, "lab")) then
-          call get_node_value(node_nuc, "lab", temp_str)
-          if (trim(adjustl(to_lower(temp_str))) == "true") then
+        if (check_for_node(node_nuc, "scattering")) then
+          call get_node_value(node_nuc, "scattering", temp_str)
+          if (trim(adjustl(to_lower(temp_str))) == "lab") then
             call list_iso_lab % append(.true.)
-          else if (trim(adjustl(to_lower(temp_str))) == "false") then
+          else if (trim(adjustl(to_lower(temp_str))) == "ace") then
             call list_iso_lab % append(.false.)
           else
-            call fatal_error("Isotropic lab scattering must be true or false")
+            call fatal_error("Scattering must be isotropic in lab or follow&
+                 & the ACE file data")
           end if
         else
           call list_iso_lab % append(.false.)
diff --git a/src/physics.F90 b/src/physics.F90
index 5691c9c0f1..6cda2f9e47 100644
--- a/src/physics.F90
+++ b/src/physics.F90
@@ -337,8 +337,8 @@ contains
 
       if (micro_xs(i_nuclide) % index_sab /= NONE) then
         if (materials(p % material) % p0(i_nuc_mat)) &
-          & call fatal_error("thermal scattering law data and isotropic lab&
-          & scattering specified for the same nuclide")
+             call fatal_error("thermal scattering law data and isotropic lab&
+             & scattering specified for the same nuclide")
 
         ! S(a,b) scattering
         call sab_scatter(i_nuclide, micro_xs(i_nuclide) % index_sab, &
@@ -351,7 +351,7 @@ contains
         ! Perform collision physics for elastic scattering
         call elastic_scatter(i_nuclide, rxn, &
              p % E, p % coord0 % uvw, p % mu, p % wgt, &
-             & materials(p % material) % p0(i_nuc_mat))
+             materials(p % material) % p0(i_nuc_mat))
       end if
 
       p % event_MT = ELASTIC