diff --git a/src/power_policy/imx8_alternating.hpp b/src/power_policy/imx8_alternating.hpp
index 82e74b16..c162fd20 100644
--- a/src/power_policy/imx8_alternating.hpp
+++ b/src/power_policy/imx8_alternating.hpp
@@ -34,11 +34,11 @@ class PowerPolicy_Imx8_Alternating : public PowerPolicy
         }
 
         try {
-            f1_a53 = a53_pol.available_frequencies->at(std::stoul(a53_f1_str));
-            f2_a53 = a53_pol.available_frequencies->at(std::stoul(a53_f2_str));
+            f1_a53 = a53_pol.get_freq(std::stoul(a53_f1_str));
+            f2_a53 = a53_pol.get_freq(std::stoul(a53_f2_str));
 
-            f1_a72 = a72_pol.available_frequencies->at(std::stoul(a72_f1_str));
-            f2_a72 = a72_pol.available_frequencies->at(std::stoul(a72_f2_str));
+            f1_a72 = a72_pol.get_freq(std::stoul(a72_f1_str));
+            f2_a72 = a72_pol.get_freq(std::stoul(a72_f2_str));
         } catch (...) {
             throw_with_nested(
               runtime_error("All power policy arguments must be integers in the range <0, 3>"));
diff --git a/src/power_policy/imx8_fixed.hpp b/src/power_policy/imx8_fixed.hpp
index fa6430bb..f05989a3 100644
--- a/src/power_policy/imx8_fixed.hpp
+++ b/src/power_policy/imx8_fixed.hpp
@@ -30,8 +30,8 @@ class PowerPolicy_Imx8_Fixed : public PowerPolicy
 
         CpuFrequencyHz a53_freq, a72_freq;
         try {
-            a53_freq = a53_pol.available_frequencies->at(std::stoul(a53_freq_i));
-            a72_freq = a72_pol.available_frequencies->at(std::stoul(a72_freq_i));
+            a53_freq = a53_pol.get_freq(std::stoul(a53_freq_i));
+            a72_freq = a72_pol.get_freq(std::stoul(a72_freq_i));
         } catch (...) {
             throw runtime_error("Both power policy arguments must be integers in the range <0, 3>");
         }