diff --git a/hippolyzer/lib/base/datatypes.py b/hippolyzer/lib/base/datatypes.py
index 2ab7fd3..2631106 100644
--- a/hippolyzer/lib/base/datatypes.py
+++ b/hippolyzer/lib/base/datatypes.py
@@ -58,6 +58,9 @@ class TupleCoord(recordclass.datatuple, _IterableStub):  # type: ignore
     def __abs__(self):
         return self.__class__(*(abs(x) for x in self))
 
+    def __neg__(self):
+        return self.__class__(-x for x in self)
+
     def __add__(self, other):
         return self.__class__(*(x + y for x, y in zip(self, other)))