diff --git a/README.md b/README.md
index 39c7bc2f51e38983a7bfa2fa90884f6e1cd6a37f..837d3ccf671bf3d96a80719c1163fd7e4aec48df 100644
--- a/README.md
+++ b/README.md
@@ -25,7 +25,7 @@ The following components are required to be installed on your machine to build H
 * CMake (>=3.4.3)
 * Python (>=2.7)
 * GNU Make (>=3.79.1)
-* CUDA (>=9.1) (only required for GPU support)
+* OpenCL (>=1.0.0) or CUDA (>=9.1, only required for GPU support)
 
 ## Getting source code and building HPVM