diff --git a/CMakeLists.txt b/CMakeLists.txt
index 84840a6c..685166f7 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -6,6 +6,7 @@ ADD_BIICODE_TARGETS()
 ADD_BOOST(filesystem system)
 
 ACTIVATE_CPP14()
+REQUIRE_GCC_VERSION(4.9)
 
 ADD_DEFINITIONS(-D_FILE_OFFSET_BITS=64)
 TARGET_LINK_LIBRARIES(${BII_BLOCK_TARGET} INTERFACE fuse)