diff --git a/doc/internals/roots.qbk b/doc/internals/roots.qbk
index 662092519..36a6faf5e 100644
--- a/doc/internals/roots.qbk
+++ b/doc/internals/roots.qbk
@@ -1,4 +1,4 @@
- [section:roots Root Finding With Derivatives: Newton-Raphson, Halley & Schroeder]
+[section:roots Root Finding With Derivatives: Newton-Raphson, Halley & Schroeder]
 
 [h4 Synopsis]