diff --git a/user_guide_src/source/general/common_functions.rst b/user_guide_src/source/general/common_functions.rst
index e2536de..c466ca0 100644
--- a/user_guide_src/source/general/common_functions.rst
+++ b/user_guide_src/source/general/common_functions.rst
@@ -171,4 +171,9 @@
 
 	It is useful if you want to check for the availability of functions
 	such as ``eval()`` and ``exec()``, which are dangerous and might be
-	disabled on servers with highly restrictive security policies.
\ No newline at end of file
+	disabled on servers with highly restrictive security policies.
+
+	.. note:: This function was introduced because Suhosin terminated
+		script execution, but this turned out to be a bug. A fix
+		has been available for some time (version 0.9.34), but is
+		unfortunately not released yet.
\ No newline at end of file