diff --git a/example/kalman_filter-alpha_beta_filter_example2.cpp b/example/kalman_filter-alpha_beta_filter_example2.cpp
index aab6c65b..e6b777ab 100644
--- a/example/kalman_filter-alpha_beta_filter_example2.cpp
+++ b/example/kalman_filter-alpha_beta_filter_example2.cpp
@@ -2,7 +2,6 @@
 #include <units/physical/si/length.h>
 #include <units/physical/si/time.h>
 #include <units/physical/si/velocity.h>
-#include <iomanip>
 #include <iostream>
 #include <array>