diff --git a/subsys/usb/device/class/msc.c b/subsys/usb/device/class/msc.c
index 1971c942af87e0..1c79ed79e941e3 100644
--- a/subsys/usb/device/class/msc.c
+++ b/subsys/usb/device/class/msc.c
@@ -442,7 +442,7 @@ static bool readFormatCapacity(void)
 
 static bool readCapacity(void)
 {
-	uint8_t capacity[8];
+	static uint8_t capacity[8];
 
 	sys_put_be32(block_count - 1, &capacity[0]);
 	sys_put_be32(BLOCK_SIZE, &capacity[4]);