diff --git a/wpilibc/shared/src/PIDSource.cpp b/wpilibc/shared/src/PIDSource.cpp
new file mode 100644
index 0000000..167a7a2
--- /dev/null
+++ b/wpilibc/shared/src/PIDSource.cpp
@@ -0,0 +1,21 @@
+/*----------------------------------------------------------------------------*/
+/* Copyright (c) FIRST 2008-2017. All Rights Reserved.                        */
+/* Open Source Software - may be modified and shared by FRC teams. The code   */
+/* must be accompanied by the FIRST BSD license file in the root directory of */
+/* the project.                                                               */
+/*----------------------------------------------------------------------------*/
+
+#include "PIDSource.h"
+
+using namespace frc;
+
+/**
+ * Set which parameter you are using as a process control variable.
+ *
+ * @param pidSource An enum to select the parameter.
+ */
+void PIDSource::SetPIDSourceType(PIDSourceType pidSource) {
+  m_pidSource = pidSource;
+}
+
+PIDSourceType PIDSource::GetPIDSourceType() const { return m_pidSource; }