diff --git a/docs/CPP-HOWTO.md b/docs/CPP-HOWTO.md
index 99e69bd35c8464646a0b2b118f1b8928f564e736..ff4d58748d15183f9ad582d040503917d0f86679 100644
--- a/docs/CPP-HOWTO.md
+++ b/docs/CPP-HOWTO.md
@@ -120,7 +120,7 @@ To install Tink from the source code, the following prerequisites must be instal
     export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:$TARGET_DIR/lib
     ```
 
-#### Validate your installation
+### Validate your installation
 
 To validate the installation compile and run [`hello_world.cc`](https://github.com/google/tink/tree/master/examples/helloworld/cc/hello_world.cc).