diff --git a/source/shared_lib/CMakeLists.txt b/source/shared_lib/CMakeLists.txt
index 3da563e02..e5a06fc44 100644
--- a/source/shared_lib/CMakeLists.txt
+++ b/source/shared_lib/CMakeLists.txt
@@ -95,6 +95,10 @@ IF(BUILD_MEGAGLEST_MODEL_VIEWER OR BUILD_MEGAGLEST_MAP_EDITOR OR BUILD_MEGAGLEST
 		SET(EXTERNAL_LIBS ${EXTERNAL_LIBS} ${OPENGL_LIBRARY})
 	ENDIF()
 
+        IF(UNIX)
+		FIND_PACKAGE(X11 REQUIRED)
+		SET(EXTERNAL_LIBS ${EXTERNAL_LIBS} ${X11_LIBRARIES})
+        ENDIF()
 
         IF(WANT_XERCES)
 	        FIND_PACKAGE(XercesC REQUIRED)