diff --git a/lib/system/freertos/zynqmp_a53/sys.c b/lib/system/freertos/zynqmp_a53/sys.c
index a09f922..411776e 100644
--- a/lib/system/freertos/zynqmp_a53/sys.c
+++ b/lib/system/freertos/zynqmp_a53/sys.c
@@ -12,6 +12,7 @@
 #include <metal/compiler.h>
 #include <metal/io.h>
 #include <metal/sys.h>
+#include <metal/utilities.h>
 #include <stdint.h>
 #include "xil_cache.h"
 #include "xil_exception.h"
@@ -19,9 +20,6 @@
 #include "xreg_cortexa53.h"
 #include "xscugic.h"
 
-#define MB (1024 * 1024UL)
-#define GB (1024 * 1024 * 1024UL)
-
 void sys_irq_restore_enable(unsigned int flags)
 {
 	Xil_ExceptionEnableMask(~flags);
diff --git a/lib/system/generic/zynqmp_a53/sys.c b/lib/system/generic/zynqmp_a53/sys.c
index 1a244ed..bbb07c6 100644
--- a/lib/system/generic/zynqmp_a53/sys.c
+++ b/lib/system/generic/zynqmp_a53/sys.c
@@ -12,6 +12,7 @@
 #include <metal/compiler.h>
 #include <metal/io.h>
 #include <metal/sys.h>
+#include <metal/utilities.h>
 #include <stdint.h>
 #include "xil_cache.h"
 #include "xil_exception.h"
@@ -19,9 +20,6 @@
 #include "xreg_cortexa53.h"
 #include "xscugic.h"
 
-#define MB (1024 * 1024UL)
-#define GB (1024 * 1024 * 1024UL)
-
 void sys_irq_restore_enable(unsigned int flags)
 {
 	Xil_ExceptionEnableMask(~flags);