diff --git a/eo/src/eoMerge.h b/eo/src/eoMerge.h
index 1e2b2bf4..01ada3f9 100644
--- a/eo/src/eoMerge.h
+++ b/eo/src/eoMerge.h
@@ -33,6 +33,7 @@
 // EO includes
 #include <eoPop.h>     // eoPop
 #include <eoFunctor.h>  // eoMerge
+#include <utils/eoLogger.h>
 
 /**
  * eoMerge: Base class for elitist replacement algorithms. 
diff --git a/eo/src/eoReduce.h b/eo/src/eoReduce.h
index 8783c59f..7b51d586 100644
--- a/eo/src/eoReduce.h
+++ b/eo/src/eoReduce.h
@@ -34,6 +34,7 @@
 #include <eoPop.h>     // eoPop
 #include <eoFunctor.h>  // eoReduce
 #include <utils/selectors.h>
+#include <utils/eoLogger.h>
 
 /**
  * eoReduce: .reduce the new generation to the specified size