diff --git a/configure.ac b/configure.ac
index 8228f5dcf..d0faa553d 100644
--- a/configure.ac
+++ b/configure.ac
@@ -232,7 +232,7 @@ fi
 
 case "${host}" in
 *-*-linux* )
-  irrlicht_LIBS="-L/$with_irrlicht/lib/Linux -L/$with_irrlicht/lib -lIrrlicht"
+  irrlicht_LIBS="-L/$with_irrlicht/lib/Linux -L/$with_irrlicht/lib -lIrrlicht -lX11"
   ;;
 *darwin*|*macosx*)
   irrlicht_LIBS="-L/$with_irrlicht/lib/ -lIrrlicht -framework Cocoa"