--- megaglest-3.9.0/source/glest_game/CMakeLists.txt.orig	2015-03-22 16:16:15.457047179 +0100
+++ megaglest-3.9.0/source/glest_game/CMakeLists.txt	2015-03-22 16:13:20.294074647 +0100
@@ -1,7 +1,7 @@
 #########################################################################################
 # common libraries
 
-SET(EXTERNAL_LIBS "")
+SET(EXTERNAL_LIBS "-lX11")
 SET(TARGET_NAME "megaglest")
 SET(TARGET_NAME_MANPAGE "${TARGET_NAME}.6")
 
--- megaglest-3.9.0/source/g3d_viewer/CMakeLists.txt.orig	2015-03-22 16:16:26.301045478 +0100
+++ megaglest-3.9.0/source/g3d_viewer/CMakeLists.txt	2015-03-22 16:15:10.080057431 +0100
@@ -1,6 +1,6 @@
 # common libraries
 
-SET(EXTERNAL_LIBS "")
+SET(EXTERNAL_LIBS "-lX11")
 SET(TARGET_NAME "megaglest_g3dviewer")
 SET(TARGET_NAME_MANPAGE "${TARGET_NAME}.6")