diff --git a/drivers/staging/comedi/drivers/ni_stc.h b/drivers/staging/comedi/drivers/ni_stc.h
index aca6e5c34080..3c5ba613a2d6 100644
--- a/drivers/staging/comedi/drivers/ni_stc.h
+++ b/drivers/staging/comedi/drivers/ni_stc.h
@@ -992,11 +992,7 @@ static inline unsigned MSeries_AI_Config_Channel_Bits(unsigned channel)
 
 static inline unsigned MSeries_AI_Config_Bank_Bits(unsigned channel)
 {
-	unsigned bits = channel & 0x30;
-
-	if (channel & 0x40)
-		bits |= 0x400;
-	return bits;
+	return ((channel & 0x40) << 4) | (channel & 0x30);
 }
 
 static inline unsigned MSeries_AI_Config_Gain_Bits(unsigned range)