diff --git a/pystencils/data_types.py b/pystencils/data_types.py
index 6bae2da8de109085421dab6a5896f96e7bf9c3e2..532a93307078965d984d1a888c5509fb88ef5ab8 100644
--- a/pystencils/data_types.py
+++ b/pystencils/data_types.py
@@ -141,7 +141,7 @@ class TypedSymbol(sp.Symbol):
             if np.issubdtype(self.dtype.numpy_dtype, np.unsignedinteger):
                 return False
 
-        return super().is_positive
+        return super().is_negative
 
     @property
     def is_nonnegative(self):