diff --git a/src/cryfs/cli/program_options/utils.cpp b/src/cryfs/cli/program_options/utils.cpp
index 389158e4..2c2f0d2d 100644
--- a/src/cryfs/cli/program_options/utils.cpp
+++ b/src/cryfs/cli/program_options/utils.cpp
@@ -1,5 +1,6 @@
 #include "utils.h"
 #include <algorithm>
+#include <string>
 
 using std::pair;
 using std::make_pair;