diff --git a/code/CMakeModules/nel.cmake b/code/CMakeModules/nel.cmake
index c70d6acde..7ed4a1c6c 100644
--- a/code/CMakeModules/nel.cmake
+++ b/code/CMakeModules/nel.cmake
@@ -387,11 +387,11 @@ MACRO(NL_SETUP_BUILD)
 
   SET(HOST_CPU ${CMAKE_HOST_SYSTEM_PROCESSOR})
 
-  IF(HOST_CPU MATCHES "amd64|AMD64")
+  IF(HOST_CPU MATCHES "(amd|AMD)64")
     SET(HOST_CPU "x86_64")
   ELSEIF(HOST_CPU MATCHES "i.86")
     SET(HOST_CPU "x86")
-  ENDIF(HOST_CPU MATCHES "amd64|AMD64")
+  ENDIF(HOST_CPU MATCHES "(amd|AMD)64")
   
   # Determine target CPU
 
@@ -400,11 +400,11 @@ MACRO(NL_SETUP_BUILD)
     SET(TARGET_CPU ${CMAKE_SYSTEM_PROCESSOR})
   ENDIF(NOT TARGET_CPU)
 
-  IF(TARGET_CPU MATCHES "amd64|AMD64")
+  IF(TARGET_CPU MATCHES "(amd|AMD)64")
     SET(TARGET_CPU "x86_64")
   ELSEIF(TARGET_CPU MATCHES "i.86")
     SET(TARGET_CPU "x86")
-  ENDIF(TARGET_CPU MATCHES "amd64|AMD64")
+  ENDIF(TARGET_CPU MATCHES "(amd|AMD)64")
 
   IF(${CMAKE_CXX_COMPILER_ID} MATCHES "Clang")
     SET(CLANG ON)