diff --git a/examples/bonus_03_unnatural_order.cpp b/examples/bonus_03_unnatural_order.cpp
index 79789e6484cba364cc6ae8e290454953917fe104..b348c211086cbcce008411ffe39960c81aa33e26 100644
--- a/examples/bonus_03_unnatural_order.cpp
+++ b/examples/bonus_03_unnatural_order.cpp
@@ -97,7 +97,7 @@ int main(int argc, char** argv) try
 	}
 
 	// if you skip this, selection sort has no effect
-    std::shuffle(points.begin(), points.end(), std::mt19937(std::random_device{}()));
+	std::shuffle(points.begin(), points.end(), std::mt19937(std::random_device{}()));
 
 	selection_sort(points.begin(), points.end());