diff --git a/sound/usb/endpoint.c b/sound/usb/endpoint.c
index 7b84b61..ef07a6d 100644
--- a/sound/usb/endpoint.c
+++ b/sound/usb/endpoint.c
@@ -16,6 +16,7 @@
  */
 
 #include <linux/init.h>
+#include <linux/slab.h>
 #include <linux/usb.h>
 #include <linux/usb/audio.h>
 #include <linux/usb/audio-v2.h>
diff --git a/sound/usb/format.c b/sound/usb/format.c
index fcadedd..b87cf87 100644
--- a/sound/usb/format.c
+++ b/sound/usb/format.c
@@ -16,6 +16,7 @@
  */
 
 #include <linux/init.h>
+#include <linux/slab.h>
 #include <linux/usb.h>
 #include <linux/usb/audio.h>
 #include <linux/usb/audio-v2.h>
diff --git a/sound/usb/helper.c b/sound/usb/helper.c
index ba7dba4..d48d6f8 100644
--- a/sound/usb/helper.c
+++ b/sound/usb/helper.c
@@ -16,6 +16,7 @@
  */
 
 #include <linux/init.h>
+#include <linux/slab.h>
 #include <linux/usb.h>
 
 #include "usbaudio.h"
diff --git a/sound/usb/mixer_quirks.c b/sound/usb/mixer_quirks.c
index 56b6659..e7df1e5 100644
--- a/sound/usb/mixer_quirks.c
+++ b/sound/usb/mixer_quirks.c
@@ -26,6 +26,7 @@
  */
 
 #include <linux/init.h>
+#include <linux/slab.h>
 #include <linux/usb.h>
 #include <linux/usb/audio.h>
 
diff --git a/sound/usb/quirks.c b/sound/usb/quirks.c
index d4ced64..136e5b4 100644
--- a/sound/usb/quirks.c
+++ b/sound/usb/quirks.c
@@ -15,6 +15,7 @@
  */
 
 #include <linux/init.h>
+#include <linux/slab.h>
 #include <linux/usb.h>
 #include <linux/usb/audio.h>