diff --git a/cmake/cef_variables.cmake.in b/cmake/cef_variables.cmake.in
index b61bb1b3d..fb9552428 100644
--- a/cmake/cef_variables.cmake.in
+++ b/cmake/cef_variables.cmake.in
@@ -26,7 +26,7 @@ endif()
 
 # Determine the project architecture.
 if(NOT DEFINED PROJECT_ARCH)
-  if(OS_WINDOWS AND ${CMAKE_GENERATOR_PLATFORM} STREQUAL "arm64")
+  if(OS_WINDOWS AND "${CMAKE_GENERATOR_PLATFORM}" STREQUAL "arm64")
     set(PROJECT_ARCH "arm64")
   elseif(CMAKE_SIZEOF_VOID_P MATCHES 8)
     set(PROJECT_ARCH "x86_64")