diff --git a/src/base/compiler.hh b/src/base/compiler.hh
index ead1507fd4..4565143b11 100644
--- a/src/base/compiler.hh
+++ b/src/base/compiler.hh
@@ -97,6 +97,7 @@
 // Set the visibility of a symbol.
 #  define M5_PUBLIC [[gnu:visibility("default")]]
 #  define M5_LOCAL [[gnu::visibility("hidden")]]
+#  define M5_WEAK [[gnu::weak]]
 
 // Marker for what should be an unreachable point in the code.
 #  define M5_UNREACHABLE __builtin_unreachable()