diff --git a/accelerator/LocalIBMAccelerator.cpp b/accelerator/LocalIBMAccelerator.cpp
index 07cc99b..ac5a2a5 100644
--- a/accelerator/LocalIBMAccelerator.cpp
+++ b/accelerator/LocalIBMAccelerator.cpp
@@ -32,7 +32,7 @@
 #include "XACC.hpp"
 #include "json.hpp"
 #include "simulator.hpp"
-
+#include <regex>
 // for convenience
 using json = nlohmann::json;