diff --git a/src/core/alloc_type.hpp b/src/core/alloc_type.hpp
index 5d9884b863..b1b27c194d 100644
--- a/src/core/alloc_type.hpp
+++ b/src/core/alloc_type.hpp
@@ -170,22 +170,20 @@ public:
 	/**
 	 * Memory release for a single class instance.
 	 * @param ptr  the memory to free.
-	 * @param size the amount of allocated memory (unused).
 	 *
 	 * @warning The value of the \a size parameter can only be trusted for
 	 *          classes that have their own (virtual) destructor method.
 	 */
-	FORCEINLINE void operator delete(void *ptr, size_t size) { free(ptr); }
+	FORCEINLINE void operator delete(void *ptr) { free(ptr); }
 
 	/**
 	 * Memory release for an array of class instances.
 	 * @param ptr  the memory to free.
-	 * @param size the amount of allocated memory (unused).
 	 *
 	 * @warning The value of the \a size parameter can only be trusted for
 	 *          classes that have their own (virtual) destructor method.
 	 */
-	FORCEINLINE void operator delete[](void *ptr, size_t size) { free(ptr); }
+	FORCEINLINE void operator delete[](void *ptr) { free(ptr); }
 };
 
 #endif /* ALLOC_TYPE_HPP */
diff --git a/src/window_gui.h b/src/window_gui.h
index 723c00ef18..4cd4c990b3 100644
--- a/src/window_gui.h
+++ b/src/window_gui.h
@@ -349,7 +349,7 @@ public:
 	 * to destruct them all at the same time too, which is kinda hard. */
 	FORCEINLINE void *operator new[](size_t size) { NOT_REACHED(); }
 	/* Don't free the window directly; it corrupts the linked list when iterating */
-	FORCEINLINE void operator delete(void *ptr, size_t size) {}
+	FORCEINLINE void operator delete(void *ptr) {}
 
 	uint16 flags4;              ///< Window flags, @see WindowFlags
 	WindowClass window_class;   ///< Window class