diff --git a/gtsam/hybrid/HybridBayesNet.h b/gtsam/hybrid/HybridBayesNet.h
index f46ce5249..bba301be2 100644
--- a/gtsam/hybrid/HybridBayesNet.h
+++ b/gtsam/hybrid/HybridBayesNet.h
@@ -25,8 +25,6 @@
 #include <gtsam/inference/BayesNet.h>
 #include <gtsam/linear/GaussianBayesNet.h>
 
-#include <string>
-
 namespace gtsam {
 
 /**
diff --git a/gtsam/hybrid/HybridBayesTree.cpp b/gtsam/hybrid/HybridBayesTree.cpp
index df4a49f60..193635a21 100644
--- a/gtsam/hybrid/HybridBayesTree.cpp
+++ b/gtsam/hybrid/HybridBayesTree.cpp
@@ -22,14 +22,12 @@
 #include <gtsam/discrete/DiscreteFactorGraph.h>
 #include <gtsam/hybrid/HybridBayesNet.h>
 #include <gtsam/hybrid/HybridBayesTree.h>
+#include <gtsam/hybrid/HybridConditional.h>
 #include <gtsam/inference/BayesTree-inst.h>
 #include <gtsam/inference/BayesTreeCliqueBase-inst.h>
 #include <gtsam/linear/GaussianJunctionTree.h>
 
 #include <memory>
-#include <string>
-
-#include "gtsam/hybrid/HybridConditional.h"
 
 namespace gtsam {
 
diff --git a/gtsam/hybrid/HybridConditional.cpp b/gtsam/hybrid/HybridConditional.cpp
index 2228b8cdc..94d180727 100644
--- a/gtsam/hybrid/HybridConditional.cpp
+++ b/gtsam/hybrid/HybridConditional.cpp
@@ -22,9 +22,6 @@
 #include <gtsam/inference/Conditional-inst.h>
 #include <gtsam/inference/Key.h>
 
-#include <iostream>
-#include <memory>
-#include <string>
 
 namespace gtsam {