diff --git a/readme.txt b/readme.txt
index 8e7b3f952..f88589950 100644
--- a/readme.txt
+++ b/readme.txt
@@ -129,7 +129,7 @@
 - NEW: Safer messages mechanism for sandboxes (to be backported to 20.3.1).
 - NEW: Added latency measurement test application.
 - FIX: Fixed incorrect IRQ vector for PVM (bug #1146)
-       (backported to 20.3.3)
+       (backported to 20.3.4)
 - FIX: Fixed missing STM32F765 from registry (bug #1145)
        (backported to 20.3.3)(backported to 19.1.5).
 - FIX: Fixed wrong macro check on STM32 SPIv3 (bug #1144)