diff --git a/src/hotspot/share/gc/shenandoah/shenandoahControlThread.cpp b/src/hotspot/share/gc/shenandoah/shenandoahControlThread.cpp
index 7581e8dae59..3b755e4366a 100644
--- a/src/hotspot/share/gc/shenandoah/shenandoahControlThread.cpp
+++ b/src/hotspot/share/gc/shenandoah/shenandoahControlThread.cpp
@@ -482,10 +482,11 @@ void ShenandoahControlThread::request_gc(GCCause::Cause cause) {
          cause == GCCause::_codecache_GC_aggressive ||
          cause == GCCause::_codecache_GC_threshold ||
          cause == GCCause::_full_gc_alot ||
+         cause == GCCause::_wb_young_gc ||
          cause == GCCause::_wb_full_gc ||
          cause == GCCause::_wb_breakpoint ||
          cause == GCCause::_scavenge_alot,
-         "only requested GCs here");
+         "only requested GCs here: %s", GCCause::to_string(cause));
 
   if (is_explicit_gc(cause)) {
     if (!DisableExplicitGC) {