diff --git a/CMakeLists.txt b/CMakeLists.txt
index 2eb45129..f92363e7 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -259,7 +259,12 @@ ENDIF ()
 
 IF ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "MSVC90" OR "${CMAKE_CXX_COMPILER_ID}" STREQUAL "MSVC10")
     SET_SOURCE_FILES_PROPERTIES(${msgpackc_SOURCES} PROPERTIES LANGUAGE CXX)
-ENDIF()
+ENDIF ()
+
+IF ("${CMAKE_SYSTEM_PROCESSOR}" STREQUAL "sparc")
+    SET (CMAKE_C_FLAGS   "-DMSGPACK_ZONE_ALIGN=8 ${CMAKE_C_FLAGS}")
+    SET (CMAKE_CXX_FLAGS "-DMSGPACK_ZONE_ALIGN=8 ${CMAKE_CXX_FLAGS}")
+ENDIF ()
 
 IF (NOT DEFINED CMAKE_INSTALL_BINDIR)
     SET(CMAKE_INSTALL_BINDIR bin)