diff --git a/CMakeLists.txt b/CMakeLists.txt
index a7364bef2..2d971798c 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -70,8 +70,8 @@ IF(APPLE AND NOT ANDROID)
       ENDIF()
 
     ELSE()
-      #simulator uses i386 architectures
-      SET(CMAKE_OSX_ARCHITECTURES "i386" CACHE STRING "Build architectures for iOS Simulator" FORCE)
+      #simulator uses i386 and x86_64 architectures
+      SET(CMAKE_OSX_ARCHITECTURES "i386;x86_64" CACHE STRING "Build architectures for iOS Simulator" FORCE)
     ENDIF()
 
     #here we set the specific iphone sdk version. We can only set either device or simulator sdk. So if you want both you currently have to have two seperate projects
@@ -1104,9 +1104,9 @@ IF(APPLE AND NOT ANDROID)
             SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -miphoneos-version-min=${IPHONE_VERSION_MIN}" FORCE)
 
         ELSE()
-            #simulator uses i386 architectures
-            SET(CMAKE_OSX_ARCHITECTURES "i386" CACHE STRING "Build architectures for iOS Simulator" FORCE)
-            SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -mno-thumb -arch i386 -pipe -no-cpp-precomp" CACHE STRING "Flags used by the compiler during all build types." FORCE)
+            #simulator uses i386 and x86_64 architectures
+            SET(CMAKE_OSX_ARCHITECTURES "i386;x86_64" CACHE STRING "Build architectures for iOS Simulator" FORCE)
+            SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -mno-thumb -pipe -no-cpp-precomp" CACHE STRING "Flags used by the compiler during all build types." FORCE)
 
             SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -mios-simulator-version-min=${IPHONE_VERSION_MIN}" FORCE)