diff --git a/CMakeLists.txt b/CMakeLists.txt
index a98540c..a3697cb 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -479,6 +479,10 @@ if(WEBP_BUILD_VWEBP)
                                PRIVATE ${GLUT_INCLUDE_DIR}
                                        ${CMAKE_CURRENT_BINARY_DIR}/src
                                        ${OPENGL_INCLUDE_DIR})
+    if(UNIX AND NOT(ANDROID OR BLACKBERRY OR APPLE))
+      find_package(X11 REQUIRED)
+      target_link_libraries(vwebp ${X11_LIBRARIES} ${X11_Xxf86vm_LIB})
+    endif()
     install(TARGETS vwebp RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR})
     if(${CMAKE_SYSTEM_NAME} STREQUAL "Darwin")
       check_c_compiler_flag("-Wno-deprecated-declarations" HAS_NO_DEPRECATED)