diff --git a/FEATURES b/FEATURES
index 6bcc37c1..bfbb9c31 100644
--- a/FEATURES
+++ b/FEATURES
@@ -38,7 +38,7 @@ General Features:
     operation.
   - Controlling of slave states during realtime operation.
 
-* Free-Run mode, if master is idle.
+* Special Idle mode, when master is not in use.
   - Automatic scanning of slaves upon topology changes.
   - Bus visualisation and EoE processing without realtime process connected.
 
diff --git a/README b/README
index c876d600..8e89b5fe 100644
--- a/README
+++ b/README
@@ -60,8 +60,8 @@ See the INSTALL file.
 
 Realtime patches for the Linux kernel are supported, but not required. The
 realtime processing has to be done by the calling module (see API
-documentation). The EtherCAT master code itself is (except for the free-run
-mode) completely passive.
+documentation). The EtherCAT master code itself is completely passive (except
+for the idle mode).
 
 To avoid frame timeouts, deactivating DMA access for hard drives is
 recommented (hdparm -d0 <DEV>).