diff --git a/include/aoc/Point2.hpp b/include/aoc/Point2.hpp
index 97d4556..d5ad5bb 100644
--- a/include/aoc/Point2.hpp
+++ b/include/aoc/Point2.hpp
@@ -38,6 +38,7 @@ class Point2
     Point2(const int x, const int y);
     bool operator==(const Point2& rhs) const;
     bool operator!=(const Point2& rhs) const;
+    bool operator<(const Point2& rhs) const;
     Point2 operator+(const Point2& rhs) const;
     Point2 operator-(const Point2& rhs) const;
     Point2 operator*(const int rhs) const;
diff --git a/src/Point2.cpp b/src/Point2.cpp
index 96bd023..ce629a8 100644
--- a/src/Point2.cpp
+++ b/src/Point2.cpp
@@ -65,6 +65,11 @@ bool Point2::operator!=(const Point2& rhs) const
     return !(*this == rhs);
 }
 
+bool Point2::operator<(const Point2& rhs) const
+{
+    return x < rhs.x || (x == rhs.x && y < rhs.y);
+}
+
 Point2 Point2::operator+(const Point2& rhs) const
 {
     return Point2(x + rhs.x, y + rhs.y);