diff --git a/AutonomousMode/ControlModule/control_module.cpp b/AutonomousMode/ControlModule/control_module.cpp
index e510a4a..d40c90d 100644
--- a/AutonomousMode/ControlModule/control_module.cpp
+++ b/AutonomousMode/ControlModule/control_module.cpp
@@ -110,5 +110,5 @@ double ControlModule::ratio(double angle)
     double progressPercent = progress/angularRange;
 
     double speed = minAngularSpeed + progressPercent*speedRange;
-    return abs(speed);
+    return std::fabs(speed);
 }
\ No newline at end of file
diff --git a/AutonomousMode/ControlModule/control_module.h b/AutonomousMode/ControlModule/control_module.h
index 07a0cf6..af0d35a 100644
--- a/AutonomousMode/ControlModule/control_module.h
+++ b/AutonomousMode/ControlModule/control_module.h
@@ -2,6 +2,7 @@
 #include <mutex>
 #include <vector>
 #include <iostream>
+#include <cmath>
 
 class ControlModule
 {