diff --git a/src/material.cpp b/src/material.cpp
index 8c75b079d..30dfa5ed5 100644
--- a/src/material.cpp
+++ b/src/material.cpp
@@ -734,8 +734,8 @@ void Material::init_bremsstrahlung()
       // Loop over photon energies
       double c = 0.0;
       for (int i = 0; i < j; ++i) {
-        // Integra  te the CDF from the PDF using the trapezoidal rule in
-        // log-log space
+        // Integrate the CDF from the PDF using the trapezoidal rule in log-log
+        // space
         double w_l = std::log(data::ttb_e_grid(i));
         double w_r = std::log(data::ttb_e_grid(i + 1));
         double x_l = std::log(ttb->pdf(j, i));
diff --git a/src/physics.cpp b/src/physics.cpp
index 5e9afa090..bcdcf7ecf 100644
--- a/src/physics.cpp
+++ b/src/physics.cpp
@@ -7,7 +7,6 @@
 #include "openmc/eigenvalue.h"
 #include "openmc/endf.h"
 #include "openmc/error.h"
-#include "openmc/interpolate.h"
 #include "openmc/material.h"
 #include "openmc/math_functions.h"
 #include "openmc/message_passing.h"
@@ -884,9 +883,15 @@ Direction sample_target_velocity(const Nuclide& nuc, double E, Direction u,
 
     if (sampling_method == ResScatMethod::dbrc) {
       // interpolate xs since we're not exactly at the energy indices
-      double xs_low =
-        interpolate(nuc.energy_0K_, nuc.elastic_0K_, i_E_low, E_low);
-      double xs_up = interpolate(nuc.energy_0K_, nuc.elastic_0K_, i_E_up, E_up);
+      double xs_low = nuc.elastic_0K_[i_E_low];
+      double m = (nuc.elastic_0K_[i_E_low + 1] - xs_low) /
+                 (nuc.energy_0K_[i_E_low + 1] - nuc.energy_0K_[i_E_low]);
+      xs_low += m * (E_low - nuc.energy_0K_[i_E_low]);
+      double xs_up = nuc.elastic_0K_[i_E_up];
+      m = (nuc.elastic_0K_[i_E_up + 1] - xs_up) /
+          (nuc.energy_0K_[i_E_up + 1] - nuc.energy_0K_[i_E_up]);
+      xs_up += m * (E_up - nuc.energy_0K_[i_E_up]);
+
       // get max 0K xs value over range of practical relative energies
       double xs_max = *std::max_element(
         &nuc.elastic_0K_[i_E_low + 1], &nuc.elastic_0K_[i_E_up + 1]);