diff --git a/arch/arm/src/cxd56xx/cxd56_delay.c b/arch/arm/src/cxd56xx/cxd56_delay.c
index c4011c82325..3797963b52e 100644
--- a/arch/arm/src/cxd56xx/cxd56_delay.c
+++ b/arch/arm/src/cxd56xx/cxd56_delay.c
@@ -34,13 +34,22 @@
  * Pre-processor Definitions
  ****************************************************************************/
 
-#define CXD56XX_LOOPSPERMSEC_156MHZ 7428ull
+#ifdef CONFIG_CXD56_USE_SYSBUS
+#  define CXD56XX_LOOPSPERMSEC_156MHZ 15533ull
+#else
+#  define CXD56XX_LOOPSPERMSEC_156MHZ 7428ull
+#endif
+
 #define CXD56XX_LOOPSPERMSEC_BY_CLOCK(clock) \
   (uint32_t)(CXD56XX_LOOPSPERMSEC_156MHZ * (clock) / 156000000ull)
 
 /* Adjust manually to be up_udelay(1000) is neary equal with up_udelay(999) */
 
-#define CXD56XX_LOOPSPERUSEC_ADJUST 810ul;
+#ifdef CONFIG_CXD56_USE_SYSBUS
+#  define CXD56XX_LOOPSPERUSEC_ADJUST 1010ul;
+#else
+#  define CXD56XX_LOOPSPERUSEC_ADJUST 810ul;
+#endif
 
 /****************************************************************************
  * Public Functions