diff --git a/src/qemu/qemu_domain.c b/src/qemu/qemu_domain.c
index eab59f33c8..b24176e4a9 100644
--- a/src/qemu/qemu_domain.c
+++ b/src/qemu/qemu_domain.c
@@ -8130,7 +8130,7 @@ qemuDomainAlignMemorySizes(virDomainDefPtr def)
  * inplace. Default rounding is now to 1 MiB (qemu requires rounding to page,
  * size so this should be safe).
  */
-int
+void
 qemuDomainMemoryDeviceAlignSize(virDomainDefPtr def,
                                 virDomainMemoryDefPtr mem)
 {
@@ -8139,8 +8139,6 @@ qemuDomainMemoryDeviceAlignSize(virDomainDefPtr def,
         mem->size = VIR_ROUND_UP(mem->size,
                                  qemuDomainGetMemorySizeAlignment(def));
     }
-
-    return 0;
 }
 
 
diff --git a/src/qemu/qemu_domain.h b/src/qemu/qemu_domain.h
index 4b5b937f41..adba79aded 100644
--- a/src/qemu/qemu_domain.h
+++ b/src/qemu/qemu_domain.h
@@ -754,8 +754,8 @@ bool qemuDomainHasBlockjob(virDomainObjPtr vm, bool copy_only)
 unsigned long long qemuDomainGetMemorySizeAlignment(const virDomainDef *def);
 
 int qemuDomainAlignMemorySizes(virDomainDefPtr def);
-int qemuDomainMemoryDeviceAlignSize(virDomainDefPtr def,
-                                    virDomainMemoryDefPtr mem);
+void qemuDomainMemoryDeviceAlignSize(virDomainDefPtr def,
+                                     virDomainMemoryDefPtr mem);
 
 virDomainChrDefPtr qemuFindAgentConfig(virDomainDefPtr def);
 
diff --git a/src/qemu/qemu_hotplug.c b/src/qemu/qemu_hotplug.c
index 2c6c30ce03..df45e1e832 100644
--- a/src/qemu/qemu_hotplug.c
+++ b/src/qemu/qemu_hotplug.c
@@ -2368,8 +2368,7 @@ qemuDomainAttachMemory(virQEMUDriverPtr driver,
     int id;
     int ret = -1;
 
-    if (qemuDomainMemoryDeviceAlignSize(vm->def, mem) < 0)
-        goto cleanup;
+    qemuDomainMemoryDeviceAlignSize(vm->def, mem);
 
     if (qemuDomainDefValidateMemoryHotplug(vm->def, priv->qemuCaps, mem) < 0)
         goto cleanup;
@@ -5611,8 +5610,7 @@ qemuDomainDetachPrepMemory(virDomainObjPtr vm,
     virDomainMemoryDefPtr mem;
     int idx;
 
-    if (qemuDomainMemoryDeviceAlignSize(vm->def, match) < 0)
-        return -1;
+    qemuDomainMemoryDeviceAlignSize(vm->def, match);
 
     if ((idx = virDomainMemoryFindByDef(vm->def, match)) < 0) {
         virReportError(VIR_ERR_DEVICE_MISSING,