diff --git a/include/cutlass/barrier.h b/include/cutlass/barrier.h
index 94f300add9..6f2373b6df 100644
--- a/include/cutlass/barrier.h
+++ b/include/cutlass/barrier.h
@@ -277,7 +277,7 @@ struct NamedBarrierManager {
   CUTLASS_DEVICE
   static void
   check_barrier_in_range([[maybe_unused]] uint32_t idx) {
-    assert((idx >= MaxNumNamedBarriers) && "Index exceeds barrier count");
+    assert((idx < MaxNumNamedBarriers) && "Index exceeds barrier count");
   }
 
   template <uint32_t... Idx>