diff --git a/src/error.h b/src/error.h
index 6d73cbb..54062c3 100644
--- a/src/error.h
+++ b/src/error.h
@@ -34,7 +34,6 @@
  *        = 0x1 -> LOW
  *        = 0x2 -> MEDIUM
  *        = 0x3 -> HIGH
- *        = 0x7 -> TOP
  * bits 19-16 -> Reserved for future usage (maybe message ranges)
  * bits 15-0  -> Error code
  */
@@ -52,8 +51,8 @@
  */
 #define ISO_NONE                        0
 
-/** Operation canceled (ERROR,TOP, -1) */
-#define ISO_CANCELED                    0xEA70FFFF
+/** Operation canceled (ERROR,HIGH, -1) */
+#define ISO_CANCELED                    0xEA30FFFF
 
 /** Unknown or unexpected fatal error (FATAL,HIGH, -2) */
 #define ISO_FATAL_ERROR                 0xF030FFFE
diff --git a/src/libiso_msgs.h b/src/libiso_msgs.h
index 94407a0..7c29a91 100644
--- a/src/libiso_msgs.h
+++ b/src/libiso_msgs.h
@@ -172,7 +172,7 @@ struct libiso_msgs_item;
 #define LIBISO_MSGS_PRIO_LOW                                         0x10000000 
 #define LIBISO_MSGS_PRIO_MEDIUM                                      0x20000000
 #define LIBISO_MSGS_PRIO_HIGH                                        0x30000000
-#define LIBISO_MSGS_PRIO_TOP                                         0x70000000
+#define LIBISO_MSGS_PRIO_TOP                                         0x7ffffffe
 
 /* Do not use this priority for submitting */
 #define LIBISO_MSGS_PRIO_NEVER                                       0x7fffffff