diff --git a/scripts/buildsystems/vcpkg.cmake b/scripts/buildsystems/vcpkg.cmake
index 652322eba9..0b2507cac1 100644
--- a/scripts/buildsystems/vcpkg.cmake
+++ b/scripts/buildsystems/vcpkg.cmake
@@ -833,8 +833,10 @@ macro("${VCPKG_OVERRIDE_FIND_PACKAGE_NAME}" z_vcpkg_find_package_package_name)
     foreach(z_vcpkg_find_package_${z_vcpkg_find_package_backup_id}_backup_var IN LISTS z_vcpkg_find_package_${z_vcpkg_find_package_backup_id}_backup_vars)
         if(DEFINED z_vcpkg_find_package_${z_vcpkg_find_package_backup_id}_backup_${z_vcpkg_find_package_${z_vcpkg_find_package_backup_id}_backup_var})
             set("${z_vcpkg_find_package_${z_vcpkg_find_package_backup_id}_backup_var}" "${z_vcpkg_find_package_${z_vcpkg_find_package_backup_id}_backup_${z_vcpkg_find_package_${z_vcpkg_find_package_backup_id}_backup_var}}")
+        else()
+            unset("${z_vcpkg_find_package_${z_vcpkg_find_package_backup_id}_backup_var}")
         endif()
-        unset("${z_vcpkg_find_package_${z_vcpkg_find_package_backup_id}_backup_var}")
+        unset("z_vcpkg_find_package_${z_vcpkg_find_package_backup_id}_backup_${z_vcpkg_find_package_${z_vcpkg_find_package_backup_id}_backup_var}")
     endforeach()
     math(EXPR z_vcpkg_find_package_backup_id "${z_vcpkg_find_package_backup_id} - 1")
     if(z_vcpkg_find_package_backup_id LESS "0")