diff --git a/src/cryfs/config/CryConfigFile.cpp b/src/cryfs/config/CryConfigFile.cpp
index 5cc7c0b3..22a17ac8 100644
--- a/src/cryfs/config/CryConfigFile.cpp
+++ b/src/cryfs/config/CryConfigFile.cpp
@@ -4,7 +4,6 @@
 #include <sstream>
 #include <cpp-utils/logging/logging.h>
 
-using boost::optional;
 using boost::none;
 using std::ifstream;
 using std::ofstream;