diff --git a/include/rapidcheck/Random.h b/include/rapidcheck/Random.h
index e510673..4b01f58 100644
--- a/include/rapidcheck/Random.h
+++ b/include/rapidcheck/Random.h
@@ -3,6 +3,7 @@
 #include <cstdint>
 #include <array>
 #include <limits>
+#include <iosfwd>
 
 namespace rc {