diff --git a/builder/virtualbox/common/hw_config.go b/builder/virtualbox/common/hw_config.go
index 48ce852aa..6da48bf7d 100644
--- a/builder/virtualbox/common/hw_config.go
+++ b/builder/virtualbox/common/hw_config.go
@@ -9,8 +9,8 @@ import (
 type HWConfig struct {
 
 	// cpu information
-	CpuCount   int `mapstructure:"cpu_count"`
-	MemorySize int `mapstructure:"memory_size"`
+	CpuCount   int `mapstructure:"cpus"`
+	MemorySize int `mapstructure:"memory"`
 
 	// device presence
 	Sound string `mapstructure:"sound"`
@@ -22,7 +22,7 @@ func (c *HWConfig) Prepare(ctx *interpolate.Context) []error {
 
 	// Hardware and cpu options
 	if c.CpuCount < 0 {
-		errs = append(errs, fmt.Errorf("An invalid cpu_count was specified (cpu_count < 0): %d", c.CpuCount))
+		errs = append(errs, fmt.Errorf("An invalid number of cpus was specified (cpus < 0): %d", c.CpuCount))
 		c.CpuCount = 0
 	}
 	if c.CpuCount == 0 {
@@ -30,7 +30,7 @@ func (c *HWConfig) Prepare(ctx *interpolate.Context) []error {
 	}
 
 	if c.MemorySize < 0 {
-		errs = append(errs, fmt.Errorf("An invalid memory_size was specified (memory_size < 0): %d", c.MemorySize))
+		errs = append(errs, fmt.Errorf("An invalid memory size was specified (memory < 0): %d", c.MemorySize))
 		c.MemorySize = 0
 	}
 	if c.MemorySize == 0 {
diff --git a/website/source/docs/builders/virtualbox-iso.html.md.erb b/website/source/docs/builders/virtualbox-iso.html.md.erb
index 50ec05ec6..0ebfa3679 100644
--- a/website/source/docs/builders/virtualbox-iso.html.md.erb
+++ b/website/source/docs/builders/virtualbox-iso.html.md.erb
@@ -94,7 +94,7 @@ builder.
     five seconds and one minute 30 seconds, respectively. If this isn't
     specified, the default is `10s` or 10 seconds.
 
--   `cpu_count` (number) - The number of cpus to use for building the VM.
+-   `cpus` (number) - The number of cpus to use for building the VM.
     Defaults to building with just one.
 
 -   `disk_size` (number) - The size, in megabytes, of the hard disk to create
@@ -252,7 +252,7 @@ builder.
 -   `keep_registered` (boolean) - Set this to `true` if you would like to keep
     the VM registered with virtualbox. Defaults to `false`.
 
--   `memory_size` (number) - The amount of memory to use for building the VM
+-   `memory` (number) - The amount of memory to use for building the VM
     in megabytes. Defaults to `512` megabytes.
 
 -   `output_directory` (string) - This is the path to the directory where the