diff --git a/plat/arm/fvp/include/platform_def.h b/plat/arm/fvp/include/platform_def.h
index 3afc9b8..7fc147d 100644
--- a/plat/arm/fvp/include/platform_def.h
+++ b/plat/arm/fvp/include/platform_def.h
@@ -37,6 +37,10 @@
 /* Base address of non-trusted watchdog (SP805) */
 #define SP805_WDOG_BASE			0x1C0F0000
 
+/* Base address of trusted watchdog (SP805) */
+#define SP805_TWDOG_BASE		0x2A490000
+#define IRQ_TWDOG_INTID			56
+
 /*******************************************************************************
  * Base address and size of external NVM flash
  ******************************************************************************/
diff --git a/plat/arm/juno/include/platform_def.h b/plat/arm/juno/include/platform_def.h
index 0f9bb77..2de11fd 100644
--- a/plat/arm/juno/include/platform_def.h
+++ b/plat/arm/juno/include/platform_def.h
@@ -42,6 +42,10 @@
 /* Base address of non-trusted watchdog (SP805) */
 #define SP805_WDOG_BASE			0x1C0F0000
 
+/* Base address of trusted watchdog (SP805) */
+#define SP805_TWDOG_BASE		0x2A4A0000
+#define IRQ_TWDOG_INTID			86
+
 /* Memory mapped Generic timer interfaces  */
 #define SYS_CNT_BASE1		0x2a830000