diff --git a/README.md b/README.md
index 4efedb1..e7d4131 100644
--- a/README.md
+++ b/README.md
@@ -16,6 +16,7 @@ The easiest way to get the source code is by cloning the git repository:
 
  * `GCC 4.7` or higher (with C++11 support)
  * `bison`
+ * `bison++`
  * `GNU make`
 
 ### Compilation