1 files changed, 1 insertions, 0 deletions

diff --git a/src/key.h b/src/key.h
index be9f95f4..d6b2f2f2 100644
--- a/src/key.h
+++ b/src/key.h
@@ -25,6 +25,7 @@
 #define LIBDCP_KEY_H
 
 #include <stdint.h>
+#include <string>
 
 namespace dcp {