diff --git a/drivers/staging/greybus/core.c b/drivers/staging/greybus/core.c
index 458020997294..db1da8a37787 100644
--- a/drivers/staging/greybus/core.c
+++ b/drivers/staging/greybus/core.c
@@ -272,5 +272,5 @@ static void __exit gb_exit(void)
 }
 module_exit(gb_exit);
 
-MODULE_LICENSE("GPL");
+MODULE_LICENSE("GPL v2");
 MODULE_AUTHOR("Greg Kroah-Hartman <gregkh@linuxfoundation.org>");
diff --git a/drivers/staging/greybus/es1.c b/drivers/staging/greybus/es1.c
index 0df7bddbff69..4bba5d558e84 100644
--- a/drivers/staging/greybus/es1.c
+++ b/drivers/staging/greybus/es1.c
@@ -694,5 +694,5 @@ static struct usb_driver es1_ap_driver = {
 
 module_usb_driver(es1_ap_driver);
 
-MODULE_LICENSE("GPL");
+MODULE_LICENSE("GPL v2");
 MODULE_AUTHOR("Greg Kroah-Hartman <gregkh@linuxfoundation.org>");
diff --git a/drivers/staging/greybus/es2.c b/drivers/staging/greybus/es2.c
index dfadcb4ad93c..efdd48d9df8f 100644
--- a/drivers/staging/greybus/es2.c
+++ b/drivers/staging/greybus/es2.c
@@ -694,5 +694,5 @@ static struct usb_driver es1_ap_driver = {
 
 module_usb_driver(es1_ap_driver);
 
-MODULE_LICENSE("GPL");
+MODULE_LICENSE("GPL v2");
 MODULE_AUTHOR("Greg Kroah-Hartman <gregkh@linuxfoundation.org>");
diff --git a/drivers/staging/greybus/gpb.c b/drivers/staging/greybus/gpb.c
index 33bbe7917f09..d5747b291171 100644
--- a/drivers/staging/greybus/gpb.c
+++ b/drivers/staging/greybus/gpb.c
@@ -87,4 +87,4 @@ static void __exit gpbridge_exit(void)
 }
 module_exit(gpbridge_exit);
 
-MODULE_LICENSE("GPL");
+MODULE_LICENSE("GPL v2");