diff --git a/dbus/dbusutil.hpp b/dbus/dbusutil.hpp
index 54126cf..8bd2824 100644
--- a/dbus/dbusutil.hpp
+++ b/dbus/dbusutil.hpp
@@ -1,6 +1,7 @@
 #pragma once
 
 #include <stdexcept>
+#include <string>
 
 namespace pid_control
 {
@@ -22,4 +23,9 @@
     }
 };
 
+std::string getSensorPath(const std::string& type, const std::string& id);
+std::string getMatch(const std::string& type, const std::string& id);
+void scaleSensorReading(const double min, const double max, double& value);
+bool validType(const std::string& type);
+
 } // namespace pid_control
diff --git a/util.hpp b/util.hpp
index 62c1e66..efe920c 100644
--- a/util.hpp
+++ b/util.hpp
@@ -32,11 +32,6 @@
     "xyz.openbmc_project.Sensor.Threshold.Critical";
 const std::string propertiesintf = "org.freedesktop.DBus.Properties";
 
-std::string getSensorPath(const std::string& type, const std::string& id);
-std::string getMatch(const std::string& type, const std::string& id);
-void scaleSensorReading(const double min, const double max, double& value);
-bool validType(const std::string& type);
-
 /*
  * Given a path that optionally has a glob portion, fill it out.
  */