diff --git a/CMakeLists.txt b/CMakeLists.txt
index 3d2db2da6..23c44ebf2 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -75,6 +75,12 @@ FOREACH(ver_var VER_MAJOR;VER_MINOR;VER_PATCH;MEGAGLEST_VERSION)
 ENDFOREACH()
 MESSAGE(STATUS "Detected MegaGlest Version is [v${MEGAGLEST_VERSION}] ")
 
+SET(PIC_FLAG "${PIC_FLAG} -fPIC")
+IF(WANT_STATIC_LIBS AND "${CMAKE_SIZEOF_VOID_P}" EQUAL "8")
+	# CMAKE_SIZEOF_VOID_P=8 => 64bit
+	ADD_DEFINITIONS("${PIC_FLAG}")
+ENDIF()
+
 ## Compiler flags, CPACK configuration and other Apple specific code.
 IF(APPLE)
 	SET(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -stdlib=libc++")