diff --git a/ggml/src/ggml-hrx/kernel-corpus/kernels/loom-libs/motifs/routing/weighted_reduce_next_rmsnorm_f32.loom b/ggml/src/ggml-hrx/kernel-corpus/kernels/loom-libs/motifs/routing/weighted_reduce_next_rmsnorm_f32.loom
index 108953ff0705..3b5286ee6f37 100644
--- a/ggml/src/ggml-hrx/kernel-corpus/kernels/loom-libs/motifs/routing/weighted_reduce_next_rmsnorm_f32.loom
+++ b/ggml/src/ggml-hrx/kernel-corpus/kernels/loom-libs/motifs/routing/weighted_reduce_next_rmsnorm_f32.loom
@@ -111,7 +111,8 @@ template.def<@ggml.routing.weighted_reduce_next_rmsnorm_f32> device requires [#t
 // Q8 consumers. The reload keeps the legacy reduction and RMSNorm motif exact.
 template.def<@ggml.routing.weighted_reduce_next_rmsnorm_f32_publish_q8> device requires [#target.subgroup.size<32>] @ggml_routing_weighted_reduce_next_rmsnorm_f32_publish_q8(%token_count: index, %route_weights: buffer, %routed_output: buffer, %hidden_state: buffer, %next_norm_weight: buffer, %next_projection_input: buffer, %q8_output: buffer) {
   template.apply<@ggml.routing.weighted_reduce_next_rmsnorm_f32>(%token_count, %route_weights, %routed_output, %hidden_state, %next_norm_weight, %next_projection_input) : (index, buffer, buffer, buffer, buffer, buffer)
-  kernel.barrier<workgroup> scope(workgroup) ordering(acq_rel)
+  // The packer reads global F32 output written by other workitems.
+  kernel.barrier<global> scope(workgroup) ordering(acq_rel)
 
   %workitem = kernel.workitem.id<x> : index
   %token0 = kernel.workgroup.id<x> : index