diff --git a/builder/proxmox/bootcommand_driver.go b/builder/proxmox/bootcommand_driver.go
index 1570845fe..372e34829 100644
--- a/builder/proxmox/bootcommand_driver.go
+++ b/builder/proxmox/bootcommand_driver.go
@@ -102,13 +102,10 @@ func (p *proxmoxDriver) SendSpecial(special string, action bootcommand.KeyAction
 }
 
 func (p *proxmoxDriver) send(keys string) error {
-	res, err := p.client.MonitorCmd(p.vmRef, "sendkey "+keys)
+	err := p.client.Sendkey(p.vmRef, keys)
 	if err != nil {
 		return err
 	}
-	if data, ok := res["data"].(string); ok && len(data) > 0 {
-		return fmt.Errorf("failed to send keys: %s", data)
-	}
 
 	time.Sleep(p.interval)
 	return nil
diff --git a/builder/proxmox/step_type_boot_command.go b/builder/proxmox/step_type_boot_command.go
index 04361ee21..97cb70c54 100644
--- a/builder/proxmox/step_type_boot_command.go
+++ b/builder/proxmox/step_type_boot_command.go
@@ -30,7 +30,7 @@ type bootCommandTemplateData struct {
 }
 
 type commandTyper interface {
-	MonitorCmd(*proxmox.VmRef, string) (map[string]interface{}, error)
+	Sendkey(*proxmox.VmRef, string) error
 }
 
 var _ commandTyper = &proxmox.Client{}
diff --git a/builder/proxmox/step_type_boot_command_test.go b/builder/proxmox/step_type_boot_command_test.go
index 9514ee0c4..c1581a3f8 100644
--- a/builder/proxmox/step_type_boot_command_test.go
+++ b/builder/proxmox/step_type_boot_command_test.go
@@ -13,75 +13,74 @@ import (
 )
 
 type commandTyperMock struct {
-	monitorCmd func(*proxmox.VmRef, string) (map[string]interface{}, error)
+	sendkey func(*proxmox.VmRef, string) error
 }
 
-func (m commandTyperMock) MonitorCmd(ref *proxmox.VmRef, cmd string) (map[string]interface{}, error) {
-	return m.monitorCmd(ref, cmd)
+func (m commandTyperMock) Sendkey(ref *proxmox.VmRef, cmd string) error {
+	return m.sendkey(ref, cmd)
 }
 
 var _ commandTyper = commandTyperMock{}
 
 func TestTypeBootCommand(t *testing.T) {
 	cs := []struct {
-		name                 string
-		builderConfig        *Config
-		expectCallMonitorCmd bool
-		monitorCmdErr        error
-		monitorCmdRet        map[string]interface{}
-		expectedKeysSent     string
-		expectedAction       multistep.StepAction
+		name              string
+		builderConfig     *Config
+		expectCallSendkey bool
+		sendkeyErr        error
+		expectedKeysSent  string
+		expectedAction    multistep.StepAction
 	}{
 		{
-			name:                 "simple boot command is typed",
-			builderConfig:        &Config{BootConfig: bootcommand.BootConfig{BootCommand: []string{"hello"}}},
-			expectCallMonitorCmd: true,
-			expectedKeysSent:     "hello",
-			expectedAction:       multistep.ActionContinue,
+			name:              "simple boot command is typed",
+			builderConfig:     &Config{BootConfig: bootcommand.BootConfig{BootCommand: []string{"hello"}}},
+			expectCallSendkey: true,
+			expectedKeysSent:  "hello",
+			expectedAction:    multistep.ActionContinue,
 		},
 		{
-			name:                 "interpolated boot command",
-			builderConfig:        &Config{BootConfig: bootcommand.BootConfig{BootCommand: []string{"hello<enter>world"}}},
-			expectCallMonitorCmd: true,
-			expectedKeysSent:     "helloretworld",
-			expectedAction:       multistep.ActionContinue,
+			name:              "interpolated boot command",
+			builderConfig:     &Config{BootConfig: bootcommand.BootConfig{BootCommand: []string{"hello<enter>world"}}},
+			expectCallSendkey: true,
+			expectedKeysSent:  "helloretworld",
+			expectedAction:    multistep.ActionContinue,
 		},
 		{
-			name:                 "merge multiple interpolated boot command",
-			builderConfig:        &Config{BootConfig: bootcommand.BootConfig{BootCommand: []string{"Hello World 2.0", "foo!bar@baz"}}},
-			expectCallMonitorCmd: true,
-			expectedKeysSent:     "shift-hellospcshift-worldspc2dot0fooshift-1barshift-2baz",
-			expectedAction:       multistep.ActionContinue,
+			name:              "merge multiple interpolated boot command",
+			builderConfig:     &Config{BootConfig: bootcommand.BootConfig{BootCommand: []string{"Hello World 2.0", "foo!bar@baz"}}},
+			expectCallSendkey: true,
+			expectedKeysSent:  "shift-hellospcshift-worldspc2dot0fooshift-1barshift-2baz",
+			expectedAction:    multistep.ActionContinue,
 		},
 		{
-			name:                 "without boot command monitorcmd should not be called",
-			builderConfig:        &Config{BootConfig: bootcommand.BootConfig{BootCommand: []string{}}},
-			expectCallMonitorCmd: false,
-			expectedAction:       multistep.ActionContinue,
+			name:              "without boot command sendkey should not be called",
+			builderConfig:     &Config{BootConfig: bootcommand.BootConfig{BootCommand: []string{}}},
+			expectCallSendkey: false,
+			expectedAction:    multistep.ActionContinue,
 		},
 		{
-			name:                 "invalid boot command template function",
-			builderConfig:        &Config{BootConfig: bootcommand.BootConfig{BootCommand: []string{"{{ foo }}"}}},
-			expectCallMonitorCmd: false,
-			expectedAction:       multistep.ActionHalt,
+			name:              "invalid boot command template function",
+			builderConfig:     &Config{BootConfig: bootcommand.BootConfig{BootCommand: []string{"{{ foo }}"}}},
+			expectCallSendkey: false,
+			expectedAction:    multistep.ActionHalt,
 		},
 		{
 			// When proxmox (or Qemu, really) doesn't recognize the keycode we send, we get no error back, but
 			// a map {"data": "invalid parameter: X"}, where X is the keycode.
-			name:                 "invalid keys sent to proxmox",
-			builderConfig:        &Config{BootConfig: bootcommand.BootConfig{BootCommand: []string{"x"}}},
-			expectCallMonitorCmd: true,
-			monitorCmdRet:        map[string]interface{}{"data": "invalid parameter: x"},
-			expectedKeysSent:     "x",
-			expectedAction:       multistep.ActionHalt,
+			name:              "invalid keys sent to proxmox",
+			builderConfig:     &Config{BootConfig: bootcommand.BootConfig{BootCommand: []string{"x"}}},
+			expectCallSendkey: true,
+			sendkeyErr:        fmt.Errorf("invalid parameter: x"),
+			expectedKeysSent:  "x",
+			expectedAction:    multistep.ActionHalt,
 		},
 		{
-			name:                 "error in typing should return halt",
-			builderConfig:        &Config{BootConfig: bootcommand.BootConfig{BootCommand: []string{"hello"}}},
-			expectCallMonitorCmd: true,
-			monitorCmdErr:        fmt.Errorf("some error"),
-			expectedKeysSent:     "h",
-			expectedAction:       multistep.ActionHalt,
+			name:              "error in typing should return halt",
+			builderConfig:     &Config{BootConfig: bootcommand.BootConfig{BootCommand: []string{"hello"}}},
+			expectCallSendkey: true,
+			sendkeyErr:        fmt.Errorf("some error"),
+			expectedKeysSent:  "h",
+			expectedAction:    multistep.ActionHalt,
 		},
 	}
 
@@ -89,17 +88,14 @@ func TestTypeBootCommand(t *testing.T) {
 		t.Run(c.name, func(t *testing.T) {
 			accumulator := strings.Builder{}
 			typer := commandTyperMock{
-				monitorCmd: func(ref *proxmox.VmRef, cmd string) (map[string]interface{}, error) {
-					if !c.expectCallMonitorCmd {
-						t.Error("Did not expect MonitorCmd to be called")
-					}
-					if !strings.HasPrefix(cmd, "sendkey ") {
-						t.Errorf("Expected all commands to be sendkey, got %s", cmd)
+				sendkey: func(ref *proxmox.VmRef, cmd string) error {
+					if !c.expectCallSendkey {
+						t.Error("Did not expect sendkey to be called")
 					}
 
-					accumulator.WriteString(strings.TrimPrefix(cmd, "sendkey "))
+					accumulator.WriteString(cmd)
 
-					return c.monitorCmdRet, c.monitorCmdErr
+					return c.sendkeyErr
 				},
 			}