diff --git a/src/rttr/variant.h b/src/rttr/variant.h
index cec094b0..40978e3b 100644
--- a/src/rttr/variant.h
+++ b/src/rttr/variant.h
@@ -38,6 +38,7 @@
 #include <cstddef>
 #include <cstdint>
 #include <algorithm>
+#include <string>
 
 namespace rttr
 {