diff --git a/src/learn/convert.cpp b/src/learn/convert.cpp
index 9bd9548d..d07fc00c 100644
--- a/src/learn/convert.cpp
+++ b/src/learn/convert.cpp
@@ -27,10 +27,6 @@
 #include <regex>
 #include <filesystem>
 
-#if defined (_OPENMP)
-#include <omp.h>
-#endif
-
 using namespace std;
 
 namespace Learner
diff --git a/src/learn/gensfen.cpp b/src/learn/gensfen.cpp
index 589d9559..65e64177 100644
--- a/src/learn/gensfen.cpp
+++ b/src/learn/gensfen.cpp
@@ -28,10 +28,6 @@
 #include <sstream>
 #include <unordered_set>
 
-#if defined (_OPENMP)
-#include <omp.h>
-#endif
-
 using namespace std;
 
 namespace Learner
diff --git a/src/learn/learning_tools.cpp b/src/learn/learning_tools.cpp
index de6da9c5..eca11c47 100644
--- a/src/learn/learning_tools.cpp
+++ b/src/learn/learning_tools.cpp
@@ -2,9 +2,6 @@
 
 #if defined (EVAL_LEARN)
 
-#if defined(_OPENMP)
-#include <omp.h>
-#endif
 #include "../misc.h"
 
 using namespace Eval;