diff --git a/runtime/Cpp/runtime/src/antlr4-common.h b/runtime/Cpp/runtime/src/antlr4-common.h
index bb9bfeafe..a28115cac 100644
--- a/runtime/Cpp/runtime/src/antlr4-common.h
+++ b/runtime/Cpp/runtime/src/antlr4-common.h
@@ -33,6 +33,7 @@
 #include <exception>
 #include <bitset>
 #include <condition_variable>
+#include <functional>
 
 // Defines for the Guid class and other platform dependent stuff.
 #ifdef _WIN32