diff --git a/target/sparc/ldst_helper.c b/target/sparc/ldst_helper.c
index ade4fb0541..d3747cf0f2 100644
--- a/target/sparc/ldst_helper.c
+++ b/target/sparc/ldst_helper.c
@@ -1631,6 +1631,7 @@ void helper_st_asi(CPUSPARCState *env, target_ulong addr, target_ulong val,
             env->scratch[i] = val;
             return;
         }
+    case ASI_QUEUE: /* UA2005 CPU mondo queue */
     case ASI_DCACHE_DATA: /* D-cache data */
     case ASI_DCACHE_TAG: /* D-cache tag access */
     case ASI_ESTATE_ERROR_EN: /* E-cache error enable */