diff --git a/ip/altera_epcq_controller_mod/HAL/src/altera_epcq_controller_mod.c b/ip/altera_epcq_controller_mod/HAL/src/altera_epcq_controller_mod.c
index 35c7c10..3c096d1 100644
--- a/ip/altera_epcq_controller_mod/HAL/src/altera_epcq_controller_mod.c
+++ b/ip/altera_epcq_controller_mod/HAL/src/altera_epcq_controller_mod.c
@@ -736,7 +736,7 @@ ALT_INLINE alt_32 static alt_epcq_validate_read_write_arguments
   /* make sure start and end address is less then the end address of the flash */
   if(
 		  start_address >= epcq_flash_info->data_end ||
-		  end_address >= epcq_flash_info->data_end ||
+		  end_address > epcq_flash_info->data_end ||
 		  offset < 0 ||
 		  length < 0
   )