diff --git a/include/plat/arm/common/aarch64/arm_macros.S b/include/plat/arm/common/aarch64/arm_macros.S
index eaaa62f..384bb51 100644
--- a/include/plat/arm/common/aarch64/arm_macros.S
+++ b/include/plat/arm/common/aarch64/arm_macros.S
@@ -57,7 +57,7 @@
 	/* ---------------------------------------------
 	 * The below utility macro prints out relevant GIC
 	 * registers whenever an unhandled exception is
-	 * taken in BL3-1 on ARM standard platforms.
+	 * taken in BL31 on ARM standard platforms.
 	 * Expects: GICD base in x16, GICC base in x17
 	 * Clobbers: x0 - x10, sp
 	 * ---------------------------------------------
@@ -125,7 +125,7 @@
 	/* ------------------------------------------------
 	 * The below required platform porting macro prints
 	 * out relevant interconnect registers whenever an
-	 * unhandled exception is taken in BL3-1.
+	 * unhandled exception is taken in BL31.
 	 * Clobbers: x0 - x9, sp
 	 * ------------------------------------------------
 	 */
diff --git a/include/plat/arm/common/arm_def.h b/include/plat/arm/common/arm_def.h
index 4a50c1c..b2db616 100644
--- a/include/plat/arm/common/arm_def.h
+++ b/include/plat/arm/common/arm_def.h
@@ -41,7 +41,7 @@
  * Definitions common to all ARM standard platforms
  *****************************************************************************/
 
-/* Special value used to verify platform parameters from BL2 to BL3-1 */
+/* Special value used to verify platform parameters from BL2 to BL31 */
 #define ARM_BL31_PLAT_PARAM_VAL		0x0f1e2d3c4b5a6978ULL
 
 #define ARM_CLUSTER_COUNT		2
@@ -257,7 +257,7 @@
  * BL2 specific defines.
  ******************************************************************************/
 /*
- * Put BL2 just below BL3-1. BL2_BASE is calculated using the current BL2 debug
+ * Put BL2 just below BL31. BL2_BASE is calculated using the current BL2 debug
  * size plus a little space for growth.
  */
 #if TRUSTED_BOARD_BOOT
@@ -268,11 +268,11 @@
 #define BL2_LIMIT			BL31_BASE
 
 /*******************************************************************************
- * BL3-1 specific defines.
+ * BL31 specific defines.
  ******************************************************************************/
 /*
- * Put BL3-1 at the top of the Trusted SRAM. BL31_BASE is calculated using the
- * current BL3-1 debug size plus a little space for growth.
+ * Put BL31 at the top of the Trusted SRAM. BL31_BASE is calculated using the
+ * current BL31 debug size plus a little space for growth.
  */
 #define BL31_BASE			(ARM_BL_RAM_BASE +		\
 						ARM_BL_RAM_SIZE -	\
@@ -281,7 +281,7 @@
 #define BL31_LIMIT			(ARM_BL_RAM_BASE + ARM_BL_RAM_SIZE)
 
 /*******************************************************************************
- * BL3-2 specific defines.
+ * BL32 specific defines.
  ******************************************************************************/
 /*
  * On ARM standard platforms, the TSP can execute from Trusted SRAM,
diff --git a/include/plat/arm/common/plat_arm.h b/include/plat/arm/common/plat_arm.h
index 32c062d..3b6a04b 100644
--- a/include/plat/arm/common/plat_arm.h
+++ b/include/plat/arm/common/plat_arm.h
@@ -87,7 +87,7 @@
 #else
 
 /*
- * Empty macros for all other BL stages other than BL3-1
+ * Empty macros for all other BL stages other than BL31
  */
 #define ARM_INSTANTIATE_LOCK
 #define arm_lock_init()
@@ -171,7 +171,7 @@
 void arm_bl2u_platform_setup(void);
 void arm_bl2u_plat_arch_setup(void);
 
-/* BL3-1 utility functions */
+/* BL31 utility functions */
 void arm_bl31_early_platform_setup(bl31_params_t *from_bl2,
 				void *plat_params_from_bl2);
 void arm_bl31_platform_setup(void);
diff --git a/include/plat/arm/css/common/aarch64/css_macros.S b/include/plat/arm/css/common/aarch64/css_macros.S
index 9f18e09..9124fdc 100644
--- a/include/plat/arm/css/common/aarch64/css_macros.S
+++ b/include/plat/arm/css/common/aarch64/css_macros.S
@@ -36,7 +36,7 @@
 	/* ---------------------------------------------
 	 * The below required platform porting macro
 	 * prints out relevant GIC registers whenever an
-	 * unhandled exception is taken in BL3-1.
+	 * unhandled exception is taken in BL31.
 	 * Clobbers: x0 - x10, x16, x17, sp
 	 * ---------------------------------------------
 	 */
diff --git a/include/plat/arm/css/common/css_def.h b/include/plat/arm/css/common/css_def.h
index dcc7790..c900278 100644
--- a/include/plat/arm/css/common/css_def.h
+++ b/include/plat/arm/css/common/css_def.h
@@ -111,8 +111,8 @@
 
 /*
  * Load address of SCP_BL2 in CSS platform ports
- * SCP_BL2 is loaded to the same place as BL3-1.  Once SCP_BL2 is transferred to the
- * SCP, it is discarded and BL3-1 is loaded over the top.
+ * SCP_BL2 is loaded to the same place as BL31.  Once SCP_BL2 is transferred to the
+ * SCP, it is discarded and BL31 is loaded over the top.
  */
 #define SCP_BL2_BASE			BL31_BASE