diff --git a/src/brdecode.cc b/src/brdecode.cc
index d5c4c0d..bcd3ec7 100644
--- a/src/brdecode.cc
+++ b/src/brdecode.cc
@@ -21,6 +21,7 @@
 #include <algorithm>
 #include <exception>
 #include <vector>
+#include <string>
 
 namespace {