diff --git a/README.md b/README.md
index d185518..a584c5d 100644
--- a/README.md
+++ b/README.md
@@ -3,6 +3,16 @@
 
 An ansible role which configures kdump.
 
+## Warning
+
+The role replaces the kdump configuration of the managed
+host. Previous settings will be lost, even if they are not specified
+in the role variables. Currently, this includes replacing at least the
+following configuration files:
+
+* `/etc/sysconfig/kdump`
+* `/etc/kdump.conf`
+
 ## Role Variables
 
 **kdump_target**: Can be specified to write vmcore to a location that is not in