diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 0096f2f..2a267fa 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -23,7 +23,7 @@ if(${CMAKE_SYSTEM_PROCESSOR} MATCHES "^(arm|aarch)")
   #  add_definitions (-mfloat-abi=softfp -mfpu=neon)
   add_definitions(-DARM=1)
   set(ARM "TRUE")
-elseif(${CMAKE_SYSTEM_PROCESSOR} MATCHES "^(x86|ia64|i386|i686)")
+elseif(${CMAKE_SYSTEM_PROCESSOR} MATCHES "^(x86|ia64|i386|i686|AMD64)")
   message("  X86 processor")
   add_definitions(-DX86=1)
   set(X86 "TRUE")