diff --git a/services/spd/tspd/tspd_main.c b/services/spd/tspd/tspd_main.c
index 279da98..8cb23b9 100644
--- a/services/spd/tspd/tspd_main.c
+++ b/services/spd/tspd/tspd_main.c
@@ -273,14 +273,14 @@
  * will also return any information that the secure payload needs to do the
  * work assigned to it.
  ******************************************************************************/
-static uint64_t tspd_smc_handler(uint32_t smc_fid,
-			 uint64_t x1,
-			 uint64_t x2,
-			 uint64_t x3,
-			 uint64_t x4,
+static uintptr_t tspd_smc_handler(uint32_t smc_fid,
+			 u_register_t x1,
+			 u_register_t x2,
+			 u_register_t x3,
+			 u_register_t x4,
 			 void *cookie,
 			 void *handle,
-			 uint64_t flags)
+			 u_register_t flags)
 {
 	cpu_context_t *ns_cpu_context;
 	uint32_t linear_id = plat_my_core_pos(), ns;
diff --git a/services/spd/tspd/tspd_pm.c b/services/spd/tspd/tspd_pm.c
index 5fdd3dc..9414c15 100644
--- a/services/spd/tspd/tspd_pm.c
+++ b/services/spd/tspd/tspd_pm.c
@@ -17,7 +17,7 @@
  * The target cpu is being turned on. Allow the TSPD/TSP to perform any actions
  * needed. Nothing at the moment.
  ******************************************************************************/
-static void tspd_cpu_on_handler(uint64_t target_cpu)
+static void tspd_cpu_on_handler(u_register_t target_cpu)
 {
 }
 
@@ -25,7 +25,7 @@
  * This cpu is being turned off. Allow the TSPD/TSP to perform any actions
  * needed
  ******************************************************************************/
-static int32_t tspd_cpu_off_handler(uint64_t unused)
+static int32_t tspd_cpu_off_handler(u_register_t unused)
 {
 	int32_t rc = 0;
 	uint32_t linear_id = plat_my_core_pos();
@@ -64,7 +64,7 @@
  * This cpu is being suspended. S-EL1 state must have been saved in the
  * resident cpu (mpidr format) if it is a UP/UP migratable TSP.
  ******************************************************************************/
-static void tspd_cpu_suspend_handler(uint64_t max_off_pwrlvl)
+static void tspd_cpu_suspend_handler(u_register_t max_off_pwrlvl)
 {
 	int32_t rc = 0;
 	uint32_t linear_id = plat_my_core_pos();
@@ -100,7 +100,7 @@
  * after initialising minimal architectural state that guarantees safe
  * execution.
  ******************************************************************************/
-static void tspd_cpu_on_finish_handler(uint64_t unused)
+static void tspd_cpu_on_finish_handler(u_register_t unused)
 {
 	int32_t rc = 0;
 	uint32_t linear_id = plat_my_core_pos();
@@ -145,7 +145,7 @@
  * completed the preceding suspend call. Use that context to program an entry
  * into the TSP to allow it to do any remaining book keeping
  ******************************************************************************/
-static void tspd_cpu_suspend_finish_handler(uint64_t max_off_pwrlvl)
+static void tspd_cpu_suspend_finish_handler(u_register_t max_off_pwrlvl)
 {
 	int32_t rc = 0;
 	uint32_t linear_id = plat_my_core_pos();
@@ -176,7 +176,7 @@
  * Return the type of TSP the TSPD is dealing with. Report the current resident
  * cpu (mpidr format) if it is a UP/UP migratable TSP.
  ******************************************************************************/
-static int32_t tspd_cpu_migrate_info(uint64_t *resident_cpu)
+static int32_t tspd_cpu_migrate_info(u_register_t *resident_cpu)
 {
 	return TSP_MIGRATE_INFO;
 }