diff --git a/eo/src/apply.h b/eo/src/apply.h
index f685f8d3..01256e05 100644
--- a/eo/src/apply.h
+++ b/eo/src/apply.h
@@ -31,7 +31,10 @@
 #include <utils/eoLogger.h>
 #include <eoFunctor.h>
 #include <vector>
+
+#ifdef _OPENMP
 #include <omp.h>
+#endif
 
 /**
   Applies a unary function to a std::vector of things.
diff --git a/eo/src/utils/eoParallel.cpp b/eo/src/utils/eoParallel.cpp
index d9d09c38..f8e3c745 100644
--- a/eo/src/utils/eoParallel.cpp
+++ b/eo/src/utils/eoParallel.cpp
@@ -25,7 +25,9 @@ Caner Candan <caner.candan@thalesgroup.com>
 
 */
 
+#ifdef _OPENMP
 #include <omp.h>
+#endif
 
 #include "eoParallel.h"
 #include "eoLogger.h"