diff --git a/arch/arm/src/armv7-a/arm_head.S b/arch/arm/src/armv7-a/arm_head.S
index 21f9dd7739..b0d229a89e 100644
--- a/arch/arm/src/armv7-a/arm_head.S
+++ b/arch/arm/src/armv7-a/arm_head.S
@@ -100,7 +100,7 @@
  */
 
 #elif defined(CONFIG_BOOT_COPYTORAM)
-#  error "configuration not implemented
+#  error "configuration not implemented"
 
   /* Check for the identity mapping:  For this configuration, this would be
    * the case where the virtual beginning of FLASH is the same as the physical
diff --git a/arch/arm/src/armv7-a/arm_pghead.S b/arch/arm/src/armv7-a/arm_pghead.S
index ad8ddf4fe9..451cd13ee7 100644
--- a/arch/arm/src/armv7-a/arm_pghead.S
+++ b/arch/arm/src/armv7-a/arm_pghead.S
@@ -106,7 +106,7 @@
  */
 
 #elif defined(CONFIG_BOOT_COPYTORAM)
-#  error "configuration not implemented
+#  error "configuration not implemented"
 
   /* Check for the identity mapping:  For this configuration, this would be
    * the case where the virtual beginning of FLASH is the same as the physical
@@ -754,7 +754,7 @@ arm_data_initialize:
 	/* Text-section constants:
 	 *
 	 *   _sbss is the start of the BSS region (see ld.script)
-	 *   _ebss is the end of the BSS regsion (see ld.script)
+	 *   _ebss is the end of the BSS region (see ld.script)
 	 *
 	 * The idle task stack usually starts at the end of BSS and is of size
 	 * CONFIG_IDLETHREAD_STACKSIZE.  The heap continues from there until the