diff --git a/CMakeLists.txt b/CMakeLists.txt
index 6458cd4..8ee7d55 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -120,6 +120,9 @@ endif ()
 
 if (${CMAKE_C_COMPILER_ID} MATCHES Clang*)
 	set(CMAKE_OBJC_FLAGS "${CMAKE_OBJC_FLAGS} -Wno-deprecated-objc-isa-usage -Wno-objc-root-class")
+	if (${CMAKE_SYSTEM_PROCESSOR} STREQUAL "i686")
+		set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -march=i586")
+	endif ()
 else (${CMAKE_C_COMPILER_ID} MATCHES Clang*)
 	MESSAGE("WARNING: It is strongly recommended that you compile with clang")
 endif (${CMAKE_C_COMPILER_ID} MATCHES Clang*)