diff --git a/src/simulation.cpp b/src/simulation.cpp
index 0b97b33..b8720af 100644
--- a/src/simulation.cpp
+++ b/src/simulation.cpp
@@ -185,8 +185,7 @@ bool operator!=(Cell const &lhs, Cell const &rhs) {
 }
 
 bool operator<(Cell const &lhs, Cell const &rhs) {
-	uintptr_t hashl{ uintptr_t(lhs.x * 73856093) ^ uintptr_t(lhs.y * 19349663) };
-	uintptr_t hashr{ uintptr_t(rhs.x * 73856093) ^ uintptr_t(rhs.y * 19349663) };
-	return hashl < hashr;
+	if (lhs.y == rhs.y) return lhs.x < rhs.x;
+	else return lhs.y < rhs.y;
 }
 }