diff --git a/AutoDiffBlock.hpp b/AutoDiffBlock.hpp
index d2842370e..ff5041347 100644
--- a/AutoDiffBlock.hpp
+++ b/AutoDiffBlock.hpp
@@ -25,7 +25,6 @@
 #include <Eigen/Sparse>
 #include <vector>
 #include <cassert>
-#include <iostream>
 
 namespace AutoDiff
 {