diff --git a/src/router/routerVMs.go b/src/router/routerVMs.go
index 09d7cc9aee76960e399cf85552871d1bdde9b8f5..0fb2cd992bf72aed64ec1f4d0eaa5f695de8a9b0 100644
--- a/src/router/routerVMs.go
+++ b/src/router/routerVMs.go
@@ -181,7 +181,7 @@ func (r *RouterVMs)CreateVM(c echo.Context) error {
 	type Parameters struct {
 		Name string           `json:"name"       validate:"required,min=4,max=256"`
 		Cpus int              `json:"cpus"       validate:"required,gte=1,lte=16"`
-		Ram int               `json:"ram"        validate:"required,gte=512,lte=32768"`
+		Ram int               `json:"ram"        validate:"required,gte=512,lte=32768"`  // in MB
 		Nic vms.NicType       `json:"nic"        validate:"required"`  // "none" or "user"
 		TemplateID uuid.UUID  `json:"templateID" validate:"required"`
 	}
@@ -287,7 +287,7 @@ func (r *RouterVMs)EditVMByID(c echo.Context) error {
 		type Parameters struct {
 			Name string           `json:"name"`
 			Cpus int              `json:"cpus"`
-			Ram int               `json:"ram"`
+			Ram int               `json:"ram"`  // in MB
 			Nic vms.NicType       `json:"nic"`
 		}
 		p := new(Parameters)
diff --git a/src/vms/vm.go b/src/vms/vm.go
index 0e555e0e52bec772cce331e62a94c6ced9888e57..f8aaec0d4f17fc84c10fa3134d620b4c28144c6f 100644
--- a/src/vms/vm.go
+++ b/src/vms/vm.go
@@ -27,7 +27,7 @@ type (
 		Owner string          `json:"owner"      validate:"required,email"`
 		Name string           `json:"name"       validate:"required,min=2,max=256"`
 		Cpus int              `json:"cpus"       validate:"required,gte=1,lte=16"`
-		Ram int               `json:"ram"        validate:"required,gte=512,lte=32768"`
+		Ram int               `json:"ram"        validate:"required,gte=512,lte=32768"`  // in MB
 		Nic NicType           `json:"nic"        validate:"required"`  // "none" or "user"
 		TemplateID uuid.UUID  `json:"templateID" validate:"required"`
 		Access map[string]caps.Capabilities `json:"access"  validate:"required"`
@@ -56,7 +56,7 @@ type (
 		Owner string           `json:"owner"`
 		Name string            `json:"name"`
 		Cpus int               `json:"cpus"`
-		Ram int                `json:"ram"`
+		Ram int                `json:"ram"`  // in MB
 		Nic NicType            `json:"nic"`
 		TemplateID uuid.UUID   `json:"templateID"`
 		Access map[string]caps.Capabilities `json:"access"`