diff --git a/drivers/staging/sm750fb/sm750.h b/drivers/staging/sm750fb/sm750.h
index 5bc445571b48..793c0924463f 100644
--- a/drivers/staging/sm750fb/sm750.h
+++ b/drivers/staging/sm750fb/sm750.h
@@ -7,7 +7,6 @@
 /* please use revision id to distinguish sm750le and sm750*/
 #define SPC_SM750 0
 
-#define MB(x) ((x)<<20)
 #define MHZ(x) ((x) * 1000000)
 /* align should be 2,4,8,16 */
 #define PADDING(align, data) (((data)+(align)-1)&(~((align) - 1)))
diff --git a/drivers/staging/sm750fb/sm750_help.h b/drivers/staging/sm750fb/sm750_help.h
index e7d74e681b97..08dcc69847d7 100644
--- a/drivers/staging/sm750fb/sm750_help.h
+++ b/drivers/staging/sm750fb/sm750_help.h
@@ -81,8 +81,6 @@ static inline unsigned int absDiff(unsigned int a, unsigned int b)
 
 /* n / d + 1 / 2 = (2n + d) / 2d */
 #define roundedDiv(num, denom)	((2 * (num) + (denom)) / (2 * (denom)))
-#define MB(x) ((x)<<20)
-#define KB(x) ((x)<<10)
 #define MHz(x) ((x) * 1000000)