diff --git a/defos/src/defos.cpp b/defos/src/defos.cpp
index a735fe7..5937d73 100644
--- a/defos/src/defos.cpp
+++ b/defos/src/defos.cpp
@@ -7,7 +7,7 @@
 #endif
 #include <dmsdk/sdk.h>
 
-#if defined(DM_PLATFORM_OSX) || defined(DM_PLATFORM_WINDOWS) || defined(DM_PLATFORM_HTML5) || defined(DM_PLATFORM_LINUX)
+#if !defined(DM_HEADLESS) && (defined(DM_PLATFORM_OSX) || defined(DM_PLATFORM_WINDOWS) || defined(DM_PLATFORM_HTML5) || defined(DM_PLATFORM_LINUX))
 
 #include "defos_private.h"
 #include <stdlib.h>
diff --git a/defos/src/defos_html5.cpp b/defos/src/defos_html5.cpp
index 283b68b..26ec85f 100644
--- a/defos/src/defos_html5.cpp
+++ b/defos/src/defos_html5.cpp
@@ -1,11 +1,8 @@
-#ifndef DLIB_LOG_DOMAIN
-#define DLIB_LOG_DOMAIN "defos"
-#endif
-#include <dmsdk/sdk.h>
 
-#if defined(DM_PLATFORM_HTML5)
+#if defined(DM_PLATFORM_HTML5) && !defined(DM_HEADLESS)
 
 #include "defos_private.h"
+#include <dmsdk/sdk.h>
 #include <emscripten.h>
 #include <stdlib.h>
 
diff --git a/defos/src/defos_linux.cpp b/defos/src/defos_linux.cpp
index 1b884dd..876bdb3 100644
--- a/defos/src/defos_linux.cpp
+++ b/defos/src/defos_linux.cpp
@@ -1,6 +1,4 @@
-#include <dmsdk/sdk.h>
-
-#if defined(DM_PLATFORM_LINUX)
+#if defined(DM_PLATFORM_LINUX) && !defined(DM_HEADLESS)
 
 /*
     some resources to manage window for x11.
@@ -17,6 +15,8 @@
  setting the window icon
 */
 
+#include <dmsdk/sdk.h>
+
 #include "defos_private.h"
 #include <X11/Xlib.h>
 #include <X11/Xatom.h>
diff --git a/defos/src/defos_mac.mm b/defos/src/defos_mac.mm
index 4b46ca3..db0056a 100644
--- a/defos/src/defos_mac.mm
+++ b/defos/src/defos_mac.mm
@@ -1,11 +1,8 @@
-#ifndef DLIB_LOG_DOMAIN
-#define DLIB_LOG_DOMAIN "defos"
-#endif
-#include <dmsdk/sdk.h>
 
-#if defined(DM_PLATFORM_OSX)
+#if defined(DM_PLATFORM_OSX) && !defined(DM_HEADLESS)
 
 #include "defos_private.h"
+#include <dmsdk/sdk.h>
 #include <AppKit/AppKit.h>
 #include <IOKit/graphics/IOGraphicsLib.h>
 #include <CoreGraphics/CoreGraphics.h>
diff --git a/defos/src/defos_win.cpp b/defos/src/defos_win.cpp
index 137257d..7ac6495 100644
--- a/defos/src/defos_win.cpp
+++ b/defos/src/defos_win.cpp
@@ -1,8 +1,9 @@
+
+#if defined(DM_PLATFORM_WINDOWS) && !defined(DM_HEADLESS)
+
 #include <dmsdk/sdk.h>
 #include "defos_private.h"
 
-#if defined(DM_PLATFORM_WINDOWS)
-
 #include <atlbase.h>
 #include <atlconv.h>
 #include <WinUser.h>