diff --git a/src/dev/arm/smmu_v3_cmdexec.cc b/src/dev/arm/smmu_v3_cmdexec.cc
index 494c86798b..48896bf966 100644
--- a/src/dev/arm/smmu_v3_cmdexec.cc
+++ b/src/dev/arm/smmu_v3_cmdexec.cc
@@ -56,8 +56,7 @@ SMMUCommandExecProcess::main(Yield &yield)
         busy = true;
 
         while (true) {
-            int sizeMask =
-                mask(smmu.regs.cmdq_base & Q_BASE_SIZE_MASK) & Q_CONS_PROD_MASK;
+            int sizeMask = mask(smmu.regs.cmdq_base & Q_BASE_SIZE_MASK);
 
             if ((smmu.regs.cmdq_cons & sizeMask) ==
                     (smmu.regs.cmdq_prod & sizeMask))
diff --git a/src/dev/arm/smmu_v3_defs.hh b/src/dev/arm/smmu_v3_defs.hh
index f74f8190a1..2070e1d90f 100644
--- a/src/dev/arm/smmu_v3_defs.hh
+++ b/src/dev/arm/smmu_v3_defs.hh
@@ -92,7 +92,6 @@ enum {
     VMT_BASE_ADDR_MASK = 0x0000ffffffffffe0ULL,
     VMT_BASE_SIZE_MASK = 0x000000000000001fULL,
 
-    Q_CONS_PROD_MASK   = 0x00000000000fffffULL,
     Q_BASE_ADDR_MASK   = 0x0000ffffffffffe0ULL,
     Q_BASE_SIZE_MASK   = 0x000000000000001fULL,
 
diff --git a/src/dev/arm/smmu_v3_transl.cc b/src/dev/arm/smmu_v3_transl.cc
index f1e1fb11fb..c1a7ed1d30 100644
--- a/src/dev/arm/smmu_v3_transl.cc
+++ b/src/dev/arm/smmu_v3_transl.cc
@@ -1280,8 +1280,7 @@ SMMUTranslationProcess::completePrefetch(Yield &yield)
 void
 SMMUTranslationProcess::sendEvent(Yield &yield, const SMMUEvent &ev)
 {
-    int sizeMask = mask(smmu.regs.eventq_base & Q_BASE_SIZE_MASK) &
-            Q_CONS_PROD_MASK;
+    int sizeMask = mask(smmu.regs.eventq_base & Q_BASE_SIZE_MASK);
 
     if (((smmu.regs.eventq_prod+1) & sizeMask) ==
             (smmu.regs.eventq_cons & sizeMask))