diff --git a/src/parallels/parallels_storage.c b/src/parallels/parallels_storage.c
index 1186296348530c313538adcefa584247f0b42421..f696fcb2ac2e3e13469846221e5396bab421638e 100644
--- a/src/parallels/parallels_storage.c
+++ b/src/parallels/parallels_storage.c
@@ -709,7 +709,7 @@ parallelsStoragePoolGetAlloc(virStoragePoolDefPtr def)
     def->capacity = ((unsigned long long)sb.f_frsize *
                      (unsigned long long)sb.f_blocks);
     def->available = ((unsigned long long)sb.f_bfree *
-                            (unsigned long long)sb.f_bsize);
+                      (unsigned long long)sb.f_frsize);
     def->allocation = def->capacity - def->available;
 
     return 0;
diff --git a/src/storage/storage_backend_fs.c b/src/storage/storage_backend_fs.c
index a58280468cd3ceb45e4b74a5b646130bbdf4b415..c1684f77cb487c2b095d8b133824755ca9a21903 100644
--- a/src/storage/storage_backend_fs.c
+++ b/src/storage/storage_backend_fs.c
@@ -910,7 +910,7 @@ virStorageBackendFileSystemRefresh(virConnectPtr conn ATTRIBUTE_UNUSED,
     pool->def->capacity = ((unsigned long long)sb.f_frsize *
                            (unsigned long long)sb.f_blocks);
     pool->def->available = ((unsigned long long)sb.f_bfree *
-                            (unsigned long long)sb.f_bsize);
+                            (unsigned long long)sb.f_frsize);
     pool->def->allocation = pool->def->capacity - pool->def->available;
 
     return 0;