diff --git a/src/qemu/qemu_monitor_json.c b/src/qemu/qemu_monitor_json.c
index 70536028ab..34c4b543e8 100644
--- a/src/qemu/qemu_monitor_json.c
+++ b/src/qemu/qemu_monitor_json.c
@@ -7112,7 +7112,7 @@ qemuMonitorJSONSetIOThread(qemuMonitor *mon,
 
 #define VIR_IOTHREAD_SET_PROP_UL(propName, propVal) \
     if (iothreadInfo->set_##propVal) { \
-        memset(&prop, 0, sizeof(qemuMonitorJSONObjectProperty)); \
+        memset(&prop, 0, sizeof(prop)); \
         prop.type = QEMU_MONITOR_OBJECT_PROPERTY_ULONG; \
         prop.val.ul = iothreadInfo->propVal; \
         if (qemuMonitorJSONSetObjectProperty(mon, path, propName, &prop) < 0) \
@@ -7145,7 +7145,7 @@ qemuMonitorJSONSetIOThread(qemuMonitor *mon,
 
 #define VIR_IOTHREAD_SET_PROP_INT(propName, propVal) \
     if (iothreadInfo->set_##propVal) { \
-        memset(&prop, 0, sizeof(qemuMonitorJSONObjectProperty)); \
+        memset(&prop, 0, sizeof(prop)); \
         prop.type = QEMU_MONITOR_OBJECT_PROPERTY_INT; \
         prop.val.iv = iothreadInfo->propVal; \
         if (qemuMonitorJSONSetObjectProperty(mon, path, propName, &prop) < 0) \
diff --git a/src/qemu/qemu_process.c b/src/qemu/qemu_process.c
index 572b842349..0644f80161 100644
--- a/src/qemu/qemu_process.c
+++ b/src/qemu/qemu_process.c
@@ -5068,7 +5068,7 @@ qemuProcessGraphicsSetupListen(virQEMUDriver *driver,
                  * *_auto_unix_socket set we should use unix socket as
                  * default instead of tcp listen. */
                 if (useSocket) {
-                    memset(glisten, 0, sizeof(virDomainGraphicsListenDef));
+                    memset(glisten, 0, sizeof(*glisten));
                     glisten->socket = g_strdup_printf("%s/%s.sock", priv->libDir,
                                                       type);
                     glisten->fromConfig = true;
diff --git a/src/remote/remote_driver.c b/src/remote/remote_driver.c
index 8e78af0ea0..faad7292ed 100644
--- a/src/remote/remote_driver.c
+++ b/src/remote/remote_driver.c
@@ -2138,7 +2138,7 @@ remoteDomainGetVcpus(virDomainPtr domain,
         goto cleanup;
     }
 
-    memset(info, 0, sizeof(virVcpuInfo) * maxinfo);
+    memset(info, 0, sizeof(*info) * maxinfo);
     memset(cpumaps, 0, maxinfo * maplen);
 
     for (i = 0; i < ret.info.info_len; ++i) {
diff --git a/src/storage/storage_driver.c b/src/storage/storage_driver.c
index c19abdd2f3..5a9dcbd193 100644
--- a/src/storage/storage_driver.c
+++ b/src/storage/storage_driver.c
@@ -1279,7 +1279,7 @@ storagePoolGetInfo(virStoragePoolPtr pool,
     if (virStorageBackendForType(def->type) == NULL)
         goto cleanup;
 
-    memset(info, 0, sizeof(virStoragePoolInfo));
+    memset(info, 0, sizeof(*info));
     if (virStoragePoolObjIsActive(obj))
         info->state = VIR_STORAGE_POOL_RUNNING;
     else
diff --git a/src/test/test_driver.c b/src/test/test_driver.c
index 3767908d9d..4b8e02c684 100644
--- a/src/test/test_driver.c
+++ b/src/test/test_driver.c
@@ -4826,7 +4826,7 @@ static int testDomainGetDiskErrors(virDomainPtr dom,
 
     if (errors) {
         /* sanitize input */
-        memset(errors, 0, sizeof(virDomainDiskError) * nerrors);
+        memset(errors, 0, sizeof(*errors) * nerrors);
 
         for (i = 0; i < nerrors; i++) {
             errors[i].disk = g_strdup(vm->def->disks[i]->dst);
@@ -6878,7 +6878,7 @@ testStoragePoolGetInfo(virStoragePoolPtr pool,
         return -1;
     def = virStoragePoolObjGetDef(obj);
 
-    memset(info, 0, sizeof(virStoragePoolInfo));
+    memset(info, 0, sizeof(*info));
     if (virStoragePoolObjIsActive(obj))
         info->state = VIR_STORAGE_POOL_RUNNING;
     else