diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index e6769c06e2..5480e242ad 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -180,33 +180,9 @@ endif()
 
 # Decide on SSE setup
 
-# SSE only matters on 32-bit targets. We check compiler flags to know if we can do it.
-if( CMAKE_SIZEOF_VOID_P MATCHES "4" AND NOT CMAKE_OSX_ARCHITECTURES MATCHES ppc )
-		CHECK_CXX_COMPILER_FLAG( "-msse2 -mfpmath=sse" CAN_DO_MFPMATH )
-		CHECK_CXX_COMPILER_FLAG( -arch:SSE2 CAN_DO_ARCHSSE2 )
-		if( CAN_DO_MFPMATH )
-			set( SSE1_ENABLE "-msse -mfpmath=sse" )
-			set( SSE2_ENABLE "-msse2 -mfpmath=sse" )
-		elseif( CAN_DO_ARCHSSE2 )
-			set( SSE1_ENABLE -arch:SSE )
-			set( SSE2_ENABLE -arch:SSE2 )
-		endif()
-endif()
-
 if( X64 )
 	set( HAVE_MMX 1 )
 else( X64 )
-	set( SAFE_CMAKE_CXX_FLAGS ${CMAKE_CXX_FLAGS} )
-
-	if( DEM_CMAKE_COMPILER_IS_GNUCXX_COMPATIBLE )
-		set( CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -mmmx")
-	endif( DEM_CMAKE_COMPILER_IS_GNUCXX_COMPATIBLE )
-
-	CHECK_CXX_SOURCE_COMPILES("#include <mmintrin.h>
-		int main(void) { __m64 v = _m_from_int(0); }"
-		HAVE_MMX)
-
-	set( CMAKE_CXX_FLAGS ${SAFE_CMAKE_CXX_FLAGS} )
 endif( X64 )
 
 CHECK_CXX_SOURCE_COMPILES("#include <ppl.h>