diff --git a/misc.c b/misc.c
index 3f6d337a30..a1bd0fc156 100644
--- a/misc.c
+++ b/misc.c
@@ -185,9 +185,9 @@ void InitializeGame()
 {
 	// Initialize the autoreplace array. Needs to be cleared between each game
 	int i;
-	for (i = 0; i < 256; i++) {
+	for (i = 0; i < lengthof(_autoreplace_array); i++)
 		_autoreplace_array[i] = i;
-	}
+
 	AddTypeToEngines(); // make sure all engines have a type
 	
 	SetObjectToPlace(1, 0, 0, 0);