diff --git a/drivers/media/video/gspca/ov534.c b/drivers/media/video/gspca/ov534.c
index 2d8965003077..4fda0980be04 100644
--- a/drivers/media/video/gspca/ov534.c
+++ b/drivers/media/video/gspca/ov534.c
@@ -686,6 +686,15 @@ static void setexposure(struct gspca_dev *gspca_dev)
 	struct sd *sd = (struct sd *) gspca_dev;
 	u8 val;
 
+	if (sd->aec)
+		return;
+
+	/* 'val' is one byte and represents half of the exposure value we are
+	 * going to set into registers, a two bytes value:
+	 * 
+	 *    MSB: ((u16) val << 1) >> 8   == val >> 7
+	 *    LSB: ((u16) val << 1) & 0xff == val << 1
+	 */
 	val = sd->exposure;
 	sccb_reg_write(gspca_dev, 0x08, val >> 7);
 	sccb_reg_write(gspca_dev, 0x10, val << 1);