diff --git a/src/system/walker.rs b/src/system/walker.rs
index 0b5c9f2..378f6c3 100644
--- a/src/system/walker.rs
+++ b/src/system/walker.rs
@@ -17,7 +17,7 @@ impl LocalRandomWalker {
 impl<R: Rng> Walker<R> for LocalRandomWalker {
     fn walk(&self, rng: &mut R, position: &Position) -> Position {
         let (dim, sign) = rng.gen_range(0u32..(DIM * 2)).div_rem(&self.dim);
-        let sign = if sign == 0 { -1 } else { 1 };
+        let sign = if sign == 0 { 1 } else { -1 };
         let offset = Position::in_direction(dim, sign);
 
         position.clone() + offset