diff --git a/README.md b/README.md
index e26b1f6..06b6a8e 100644
--- a/README.md
+++ b/README.md
@@ -51,6 +51,11 @@ Please use the stable version listed above, we cannot support others.
  # apt-get install g++-4.7 (skip this step on Debian 8.x) 
 ```
 ###### After downloading and before compiling, please have a look at the main.h file
+...
+
+ # nano /xlxd/src/main.h
+ For YSF you need to define a default HotSpot frrequency !!!
+...
 ###### Download and compile the XLX sources
 ```
 # git clone https://github.com/LX3JL/xlxd.git