diff --git a/twrpinstall/twinstall.cpp b/twrpinstall/twinstall.cpp
index 7975a978..6805a2f0 100755
--- a/twrpinstall/twinstall.cpp
+++ b/twrpinstall/twinstall.cpp
@@ -342,6 +342,7 @@ int TWinstall_zip(const char* path, int* wipe_cache, bool check_for_digest) {
 			if (!system_mount_state)
 				PartitionManager.UnMount_By_Path(PartitionManager.Get_Android_Root_Path(), false);
 			if (android::base::GetBoolProperty("ro.virtual_ab.enabled", false)) {
+				PartitionManager.Unlock_Block_Partitions();
 				PartitionManager.Prepare_All_Super_Volumes();
 				gui_warn("mount_vab_partitions=Devices on super may not mount until rebooting recovery.");
 			}