diff --git a/drivers/video/sa1100fb.c b/drivers/video/sa1100fb.c
index beeec7b..8000890 100644
--- a/drivers/video/sa1100fb.c
+++ b/drivers/video/sa1100fb.c
@@ -592,6 +592,7 @@
 	return ret;
 }
 
+#ifdef CONFIG_CPU_FREQ
 /*
  *  sa1100fb_display_dma_period()
  *    Calculate the minimum period (in picoseconds) between two DMA
@@ -606,6 +607,7 @@
 	 */
 	return var->pixclock * 8 * 16 / var->bits_per_pixel;
 }
+#endif
 
 /*
  *  sa1100fb_check_var():