diff --git a/builder/proxmox/common/config.go b/builder/proxmox/common/config.go
index 2491d6b32..f4a7f7801 100644
--- a/builder/proxmox/common/config.go
+++ b/builder/proxmox/common/config.go
@@ -63,7 +63,7 @@ type Config struct {
 	AdditionalISOFiles []storageConfig `mapstructure:"additional_iso_files"`
 	VMInterface        string          `mapstructure:"vm_interface"`
 
-	Ctx interpolate.Context `mapstructure-to-hcl2:"skip"`
+	Ctx interpolate.Context `mapstructure-to-hcl2:",skip"`
 }
 
 type storageConfig struct {
diff --git a/builder/proxmox/common/config.hcl2spec.go b/builder/proxmox/common/config.hcl2spec.go
index 36176030e..2cc292dbd 100644
--- a/builder/proxmox/common/config.hcl2spec.go
+++ b/builder/proxmox/common/config.hcl2spec.go
@@ -285,6 +285,8 @@ type FlatstorageConfig struct {
 	ISOFile         *string  `mapstructure:"iso_file" cty:"iso_file" hcl:"iso_file"`
 	ISOStoragePool  *string  `mapstructure:"iso_storage_pool" cty:"iso_storage_pool" hcl:"iso_storage_pool"`
 	Unmount         *bool    `mapstructure:"unmount" cty:"unmount" hcl:"unmount"`
+	ShouldUploadISO *bool    `cty:"should_upload_iso" hcl:"should_upload_iso"`
+	DownloadPathKey *string  `cty:"download_path_key" hcl:"download_path_key"`
 }
 
 // FlatMapstructure returns a new FlatstorageConfig.
@@ -308,6 +310,8 @@ func (*FlatstorageConfig) HCL2Spec() map[string]hcldec.Spec {
 		"iso_file":             &hcldec.AttrSpec{Name: "iso_file", Type: cty.String, Required: false},
 		"iso_storage_pool":     &hcldec.AttrSpec{Name: "iso_storage_pool", Type: cty.String, Required: false},
 		"unmount":              &hcldec.AttrSpec{Name: "unmount", Type: cty.Bool, Required: false},
+		"should_upload_iso":    &hcldec.AttrSpec{Name: "should_upload_iso", Type: cty.Bool, Required: false},
+		"download_path_key":    &hcldec.AttrSpec{Name: "download_path_key", Type: cty.String, Required: false},
 	}
 	return s
 }