diff --git a/src/libutil/logging.hh b/src/libutil/logging.hh
index 84fffa820..414309a52 100644
--- a/src/libutil/logging.hh
+++ b/src/libutil/logging.hh
@@ -40,7 +40,7 @@ typedef uint64_t ActivityId;
 
 class Logger
 {
-    friend class Activity;
+    friend struct Activity;
 
 public: