diff --git a/CMakeLists.txt b/CMakeLists.txt
index 0ff120f3..f6cc2193 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -98,7 +98,7 @@ string(TOLOWER ${CMAKE_SYSTEM_PROCESSOR} CMAKE_SYSTEM_PROCESSOR_LC)
 set(COUNT 1)
 foreach(ARCH ${CMAKE_OSX_ARCHITECTURES})
   if(COUNT GREATER 1)
-    message(FATAL_ERROR "The libjpeg-turbo build system does not support multiple values in CMAKE_OSX_ARCHITECTURES.")
+    message(FATAL_ERROR "libjpeg-turbo contains assembly code, so it cannot be built with multiple values in CMAKE_OSX_ARCHITECTURES.")
   endif()
   math(EXPR COUNT "${COUNT}+1")
 endforeach()