diff --git a/README.md b/README.md
index fadea67bd40..0c20e374a1e 100644
--- a/README.md
+++ b/README.md
@@ -244,6 +244,8 @@ Unless otherwise specified, CCCL supports all the same host compilers as the CUD
 - [Linux](https://docs.nvidia.com/cuda/cuda-installation-guide-linux/index.html#host-compiler-support-policy)
 - [Windows](https://docs.nvidia.com/cuda/cuda-installation-guide-microsoft-windows/index.html#system-requirements)
 
+However, compilers not tested by our CI are unsupported. You can find the list of tested compilers in our [CI matrix](ci/matrix.yaml).
+
 ### C++ Dialects
 - C++11 (Deprecated in Thrust/CUB, to be removed in next major version)
 - C++14 (Deprecated in Thrust/CUB, to be removed in next major version)