diff --git a/CMakeLists.txt b/CMakeLists.txt
index 375189ff..36477527 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -36,7 +36,7 @@ else (WIN32)
 	IF (CMAKE_SYSTEM_PROCESSOR MATCHES "^(i.86|x86(_64)?)$")
 		if (RAIBLOCKS_SIMD_OPTIMIZATIONS)
 			set (PLATFORM_COMPILE_FLAGS "${PLATFORM_COMPILE_FLAGS} -msse4")
-		else()
+		elseif(CMAKE_SYSTEM_PROCESSOR STREQUAL "x86_64")
 			set (PLATFORM_COMPILE_FLAGS "${PLATFORM_COMPILE_FLAGS} -msse2")
 		endif()