diff --git a/drivers/clk/at91/compat.c b/drivers/clk/at91/compat.c
index b2bfb52..2fdc2fb 100644
--- a/drivers/clk/at91/compat.c
+++ b/drivers/clk/at91/compat.c
@@ -150,7 +150,7 @@
 
 static ulong at91_slow_clk_get_rate(struct clk *clk)
 {
-	return CONFIG_SYS_AT91_SLOW_CLOCK;
+	return CFG_SYS_AT91_SLOW_CLOCK;
 }
 
 static struct clk_ops at91_slow_clk_ops = {