diff --git a/CMakeLists.txt b/CMakeLists.txt
index a0f7132..b3c37b4 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -30,7 +30,7 @@ list(APPEND CORE_EXTRA src/win32_largefilewrapper.c include/win32_largefilewrapp
      src/athena/FileWriterWin32.cpp src/athena/FileReaderWin32.cpp)
 else()
 list(APPEND CORE_EXTRA src/athena/FileWriter.cpp src/athena/FileReader.cpp)
-if(APPLE OR GEKKO)
+if(APPLE OR GEKKO OR ${CMAKE_SYSTEM_NAME} MATCHES "FreeBSD")
 list(APPEND CORE_EXTRA src/osx_largefilewrapper.c include/osx_largefilewrapper.h)
 if(GEKKO)
 list(APPEND CORE_EXTRA src/gekko_support.c include/gekko_support.h)
diff --git a/include/osx_largefilewrapper.h b/include/osx_largefilewrapper.h
index b188255..939829e 100644
--- a/include/osx_largefilewrapper.h
+++ b/include/osx_largefilewrapper.h
@@ -1,7 +1,7 @@
 #ifndef OSX_LARGEFILEWRAPPER_H
 #define OSX_LARGEFILEWRAPPER_H
 
-#if defined(__APPLE__) || defined(GEKKO)
+#if defined(__APPLE__) || defined(GEKKO) || defined(__FreeBSD__)
 #include <stdio.h>
 #ifdef __cplusplus
 extern "C" {
diff --git a/src/athena/FileReader.cpp b/src/athena/FileReader.cpp
index 9aeefed..c167a72 100644
--- a/src/athena/FileReader.cpp
+++ b/src/athena/FileReader.cpp
@@ -1,6 +1,6 @@
 #include "athena/FileReader.hpp"
 
-#if __APPLE__
+#if __APPLE__ || __FreeBSD__
 #include "osx_largefilewrapper.h"
 #elif GEKKO
 #include "gekko_support.h"
diff --git a/src/athena/FileWriter.cpp b/src/athena/FileWriter.cpp
index 77215c9..2c0407f 100644
--- a/src/athena/FileWriter.cpp
+++ b/src/athena/FileWriter.cpp
@@ -1,6 +1,6 @@
 #include "athena/FileWriter.hpp"
 
-#if __APPLE__
+#if __APPLE__  || __FreeBSD__
 #include "osx_largefilewrapper.h"
 #elif GEKKO
 #include "gekko_support.h"
diff --git a/src/osx_largefilewrapper.c b/src/osx_largefilewrapper.c
index 5049bf0..21e8e1d 100644
--- a/src/osx_largefilewrapper.c
+++ b/src/osx_largefilewrapper.c
@@ -1,4 +1,4 @@
-#if defined(__APPLE__) || defined(GEKKO)
+#if defined(__APPLE__) || defined(GEKKO) || defined(__FreeBSD__)
 #include "osx_largefilewrapper.h"
 #include <stdio.h>