diff --git a/lib/si5351/si5351.h b/lib/si5351/si5351.h
--- a/lib/si5351/si5351.h
+++ b/lib/si5351/si5351.h
@@ -34,7 +34,7 @@
 
 /* Define definitions */
 
-#define SI5351_BUS_BASE_ADDR				0x60
+#define SI5351_BUS_BASE_ADDR				((0x60 & 0x7f) << 1)
 #define SI5351_XTAL_FREQ					25000000
 #define SI5351_PLL_FIXED					90000000000ULL
 #define SI5351_FREQ_MULT					100ULL