diff --git a/README.md b/README.md
index 5f1cd515..f46c88e0 100644
--- a/README.md
+++ b/README.md
@@ -130,7 +130,7 @@ __(The SDK and driver version must be 1.9 or LOWER)__
 A Linux driver must be installed before runing Graphene Library OS in enclaves.
 Simply run the following command to build the driver:
 
-__** Please make sure the GCC version is either 4 or 5) **_
+__** Please make sure the GCC version is either 4 or 5) **__
 
     cd Pal/src/host/Linux-SGX/sgx-driver
     make