diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8f3a3a1be..85f6ef282 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -41,7 +41,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 ## Fixed
 
 - Small bugfix in STM32 HAL for SPI
-  PR: 
+  PR: https://egit.irs.uni-stuttgart.de/fsfw/fsfw/pulls/599
 
 # [v4.0.0]