diff --git a/include/gsl/gsl b/include/gsl/gsl
index 3c2f574..55862eb 100644
--- a/include/gsl/gsl
+++ b/include/gsl/gsl
@@ -21,6 +21,7 @@
 #include <gsl/gsl_assert>    // Ensures/Expects
 #include <gsl/gsl_byte>      // byte
 #include <gsl/gsl_util>      // finally()/narrow()/narrow_cast()...
+#include <gsl/multi_span>    // multi_span, strided_span...
 #include <gsl/pointers>      // owner, not_null
 #include <gsl/span>          // span
 #include <gsl/string_span>   // zstring, string_span, zstring_builder...