diff --git a/README.md b/README.md
index fb50cd6..dfcf4fc 100644
--- a/README.md
+++ b/README.md
@@ -35,7 +35,7 @@ First you need to find a pool share. This share will stay in PPLNS window for 21
 
 ### Ubuntu 20.04
 
-p2pool binary:
+p2pool binary. Build might fail with clang compiler, it was only tested with GCC!
 ```
 sudo apt update && sudo apt install git build-essential cmake libuv1-dev libzmq3-dev libsodium-dev libpgm-dev libnorm-dev libgss-dev
 git clone https://github.com/SChernykh/p2pool