diff --git a/CMakeModules/DetectArchitecture.cmake b/CMakeModules/DetectArchitecture.cmake
index 09a56ae283..dc4feea56f 100644
--- a/CMakeModules/DetectArchitecture.cmake
+++ b/CMakeModules/DetectArchitecture.cmake
@@ -40,19 +40,19 @@ if (CMAKE_OSX_ARCHITECTURES)
     return()
 endif()
 
-function(detect_architecture symbol arch)
+macro(detect_architecture symbol arch)
     if (NOT DEFINED ARCHITECTURE)
         set(CMAKE_REQUIRED_QUIET 1)
         check_symbol_exists("${symbol}" "" ARCHITECTURE_${arch})
         unset(CMAKE_REQUIRED_QUIET)
 
         if (ARCHITECTURE_${arch})
-            set(ARCHITECTURE "${arch}" PARENT_SCOPE)
-            set(ARCHITECTURE_${arch} 1 PARENT_SCOPE)
+            set(ARCHITECTURE "${arch}")
+            set(ARCHITECTURE_${arch} 1)
             add_definitions(-DARCHITECTURE_${arch}=1)
         endif()
     endif()
-endfunction()
+endmacro()
 
 detect_architecture("__ARM64__" arm64)
 detect_architecture("__aarch64__" arm64)