diff --git a/CMakeLists.txt b/CMakeLists.txt
index 7b330d6..95443aa 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -5,7 +5,7 @@ set( GRIVE_VERSION "0.5.1-dev" )
 
 # common compile options
 add_definitions( -DVERSION="${GRIVE_VERSION}" )
-add_definitions( -D_FILE_OFFSET_BITS=64 )
+add_definitions( -D_FILE_OFFSET_BITS=64 -std=c++0x )
 
 add_subdirectory( libgrive )
 add_subdirectory( grive )