1 files changed, 18 insertions, 2 deletions
diff --git a/src/irr_v3d.h b/src/irr_v3d.h
index 3e95c7913..49c2e60ce 100644
--- a/src/irr_v3d.h
+++ b/src/irr_v3d.h
@@ -18,13 +18,29 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 */
 
 #pragma once
-
 #include "irrlichttypes.h"
-
 #include <vector3d.h>
+#include <functional>
 
 typedef core::vector3df v3f;
 typedef core::vector3d<double> v3d;
 typedef core::vector3d<s16> v3s16;
 typedef core::vector3d<u16> v3u16;
 typedef core::vector3d<s32> v3s32;
+
+namespace std
+{
+template <> struct hash<v3s16>
+{
+	typedef v3s16 argument_type;
+	typedef std::size_t result_type;
+	result_type operator()(const argument_type &s) const noexcept
+	{
+		// clang-format off
+		return static_cast<size_t>((static_cast<u64>(s.X) << 20) ^
+		                           (static_cast<u64>(s.Y) << 10) ^
+		                           (static_cast<u64>(s.Z)));
+		// clang-format on
+	}
+};
+}