diff --git a/hal/src/main/native/athena/DIO.cpp b/hal/src/main/native/athena/DIO.cpp
index e6308fbb75..57b115384e 100644
--- a/hal/src/main/native/athena/DIO.cpp
+++ b/hal/src/main/native/athena/DIO.cpp
@@ -200,8 +200,7 @@ void HAL_SetDigitalPWMRate(double rate, int32_t* status) {
   if (*status != 0) {
     return;
   }
-  uint16_t pwmPeriodPower =
-      std::lround(std::log(1.0 / (16 * 1.0E-6 * rate)) / std::log(2.0));
+  uint16_t pwmPeriodPower = std::lround(std::log2(1.0 / (16 * 1.0E-6 * rate)));
   digitalSystem->writePWMPeriodPower(pwmPeriodPower, status);
 }
 
diff --git a/hal/src/main/native/sim/DIO.cpp b/hal/src/main/native/sim/DIO.cpp
index b611b35e8a..f827bbf956 100644
--- a/hal/src/main/native/sim/DIO.cpp
+++ b/hal/src/main/native/sim/DIO.cpp
@@ -127,9 +127,7 @@ void HAL_SetDigitalPWMRate(double rate, int32_t* status) {
   // higher freq.
   // TODO: Round in the linear rate domain.
   // uint8_t pwmPeriodPower = static_cast<uint8_t>(
-  //    std::log(1.0 / (kExpectedLoopTiming * 0.25E-6 * rate)) /
-  //        std::log(2.0) +
-  //    0.5);
+  //     std::log2(1.0 / (kExpectedLoopTiming * 0.25E-6 * rate)) + 0.5);
   // TODO(THAD) : Add a case to set this in the simulator
   // digitalSystem->writePWMPeriodPower(pwmPeriodPower, status);
 }