diff --git a/src/ground_vehicle.hpp b/src/ground_vehicle.hpp
index e3fdb918b5..c2bd971517 100644
--- a/src/ground_vehicle.hpp
+++ b/src/ground_vehicle.hpp
@@ -302,12 +302,6 @@ struct GroundVehicle : public SpecializedVehicle<T, Type> {
 	 */
 	FORCEINLINE void ClearMultiheaded() { ClrBit(this->subtype, GVSF_MULTIHEADED); }
 
-	/**
-	 * Check if the vehicle is a front engine.
-	 * @return Returns true if the vehicle is a front engine.
-	 */
-	FORCEINLINE bool IsFrontEngine() const { return HasBit(this->subtype, GVSF_FRONT); }
-
 	/**
 	 * Check if the vehicle is a free wagon (got no engine in front of it).
 	 * @return Returns true if the vehicle is a free wagon.
@@ -338,18 +332,6 @@ struct GroundVehicle : public SpecializedVehicle<T, Type> {
 	 */
 	FORCEINLINE bool IsRearDualheaded() const { return this->IsMultiheaded() && !this->IsEngine(); }
 
-	/**
-	 * Check if the vehicle is an articulated part of an engine.
-	 * @return Returns true if the vehicle is an articulated part.
-	 */
-	FORCEINLINE bool IsArticulatedPart() const { return HasBit(this->subtype, GVSF_ARTICULATED_PART); }
-
-	/**
-	 * Check if an engine has an articulated part.
-	 * @return True if the engine has an articulated part.
-	 */
-	FORCEINLINE bool HasArticulatedPart() const { return this->Next() != NULL && this->Next()->IsArticulatedPart(); }
-
 	/**
 	 * Update the GUI variant of the current speed of the vehicle.
 	 * Also mark the widget dirty when that is needed, i.e. when
diff --git a/src/vehicle_base.h b/src/vehicle_base.h
index cc5e332d3e..d63d97b898 100644
--- a/src/vehicle_base.h
+++ b/src/vehicle_base.h
@@ -644,6 +644,33 @@ public:
 	bool IsEngineCountable() const;
 	bool HasDepotOrder() const;
 	void HandlePathfindingResult(bool path_found);
+
+	/**
+	 * Check if the vehicle is a front engine.
+	 * @return Returns true if the vehicle is a front engine.
+	 */
+	FORCEINLINE bool IsFrontEngine() const
+	{
+		return this->IsGroundVehicle() && HasBit(this->subtype, GVSF_FRONT);
+	}
+
+	/**
+	 * Check if the vehicle is an articulated part of an engine.
+	 * @return Returns true if the vehicle is an articulated part.
+	 */
+	FORCEINLINE bool IsArticulatedPart() const
+	{
+		return this->IsGroundVehicle() && HasBit(this->subtype, GVSF_ARTICULATED_PART);
+	}
+
+	/**
+	 * Check if an engine has an articulated part.
+	 * @return True if the engine has an articulated part.
+	 */
+	FORCEINLINE bool HasArticulatedPart() const
+	{
+		return this->Next() != NULL && this->Next()->IsArticulatedPart();
+	}
 };
 
 #define FOR_ALL_VEHICLES_FROM(var, start) FOR_ALL_ITEMS_FROM(Vehicle, vehicle_index, var, start)