diff --git a/CMake/variables.cmake b/CMake/variables.cmake
index ed4308cf9..4edf8b749 100644
--- a/CMake/variables.cmake
+++ b/CMake/variables.cmake
@@ -45,7 +45,7 @@ endif (DEBUG_VARIABLES_CMAKE)
 # FIXME: check fontconfig conditions (only if Xft is used or ...)
 
 if (WIN32)
-  list (APPEND FLTK_LDLIBS -lole32 -luuid -lcomctl32)
+  list (APPEND FLTK_LDLIBS -lole32 -luuid -lcomctl32 -lws2_32)
 elseif (APPLE AND OPTION_APPLE_SDL)
   # FIXME: do nothing?
 elseif (APPLE AND NOT OPTION_APPLE_X11)