diff --git a/CMakeLists.txt b/CMakeLists.txt
index 33efb2f240..f111f482ae 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -41,12 +41,7 @@ endif()
 file(WRITE "${CMAKE_CURRENT_BINARY_DIR}/_env/EXTERNAL_BUILD_ASSETS.txt" "${EXTERNAL_BUILD_ASSETS}")
 MESSAGE(STATUS "EXTERNAL_BUILD_ASSETS: ${EXTERNAL_BUILD_ASSETS}")
 
-set(GLES_OPTION OFF)
-
-if( DEFINED ENV{USE_GLES} )
-    set(USE_GLES "$ENV{USE_GLES}")
-    set(GLES_OPTION "$ENV{USE_GLES}")
-endif()
+set(GLES_OPTION "$ENV{USE_GLES}")
 
 # Will affect VCPKG dependencies
 file(WRITE "${CMAKE_CURRENT_BINARY_DIR}/_env/USE_GLES.txt" "${GLES_OPTION}")