diff --git a/core/device.cpp b/core/device.cpp
index 4d2220ff9..dfb3537e6 100644
--- a/core/device.cpp
+++ b/core/device.cpp
@@ -12,12 +12,6 @@
 struct device_table device_table;
 struct fingerprint_table fingerprint_table;
 
-bool device::operator==(const device &a) const
-{
-	return model == a.model &&
-	       serialNumber == a.serialNumber;
-}
-
 static bool same_device(const device &dev1, const device &dev2)
 {
 	return strcmp(dev1.model.c_str(), dev2.model.c_str()) == 0 &&
diff --git a/core/device.h b/core/device.h
index 720f0db5c..c51164444 100644
--- a/core/device.h
+++ b/core/device.h
@@ -67,7 +67,6 @@ extern char *fp_get_data(struct fingerprint_table *table, unsigned int i);
 #include <string>
 #include <vector>
 struct device {
-	bool operator==(const device &a) const; // TODO: remove, once devices are integrated in the undo system
 	bool operator<(const device &a) const;
 	void showchanges(const std::string &n) const;
 	std::string model;