--- a/CMakeLists.txt~	2019-07-04 14:32:37.000000000 -0500
+++ a/CMakeLists.txt	2019-09-20 15:18:10.590042650 -0500
@@ -458,20 +458,20 @@
 
 if(WEBP_BUILD_VWEBP)
   # vwebp
-  find_package(GLUT)
-  if(GLUT_FOUND)
+  find_package(FreeGLUT)
+  if(FreeGLUT_FOUND)
     include_directories(${WEBP_DEP_IMG_INCLUDE_DIRS})
     parse_makefile_am(${CMAKE_CURRENT_SOURCE_DIR}/examples "VWEBP_SRCS" "vwebp")
     add_executable(vwebp ${VWEBP_SRCS})
     target_link_libraries(vwebp
                           ${OPENGL_LIBRARIES}
                           exampleutil
-                          GLUT::GLUT
+                          -lglut
                           imageioutil
                           webp
                           webpdemux)
     target_include_directories(vwebp
-                               PRIVATE GLUT::GLUT
+                               PRIVATE -lglut
                                        ${CMAKE_CURRENT_BINARY_DIR}/src
                                        ${OPENGL_INCLUDE_DIR})
     install(TARGETS vwebp RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR})
--- a/examples/vwebp.c~	2019-07-04 14:32:37.000000000 -0500
+++ a/examples/vwebp.c	2019-09-20 15:38:32.276641491 -0500
@@ -27,7 +27,7 @@
 #if defined(HAVE_GLUT_GLUT_H)
 #include <GLUT/glut.h>
 #else
-#include <GL/glut.h>
+#include <GL/freeglut.h>
 #ifdef FREEGLUT
 #include <GL/freeglut.h>
 #endif