diff --git a/include/boost/config/compiler/gcc.hpp b/include/boost/config/compiler/gcc.hpp
index a759c4b4..da05a63e 100644
--- a/include/boost/config/compiler/gcc.hpp
+++ b/include/boost/config/compiler/gcc.hpp
@@ -299,6 +299,10 @@
 #  define BOOST_NO_CXX17_FOLD_EXPRESSIONS
 #endif
 
+#if __GNUC__ >= 7
+#  define BOOST_FALLTHROUGH __attribute__((fallthrough))
+#endif
+
 //
 // Unused attribute:
 #if __GNUC__ >= 4