diff --git a/src/libstore/filetransfer.cc b/src/libstore/filetransfer.cc
index 67af0ab02..cd15cde62 100644
--- a/src/libstore/filetransfer.cc
+++ b/src/libstore/filetransfer.cc
@@ -22,6 +22,7 @@
 #include <queue>
 #include <random>
 #include <thread>
+#include <regex>
 
 using namespace std::string_literals;