3 files changed, 3 insertions, 3 deletions
diff --git a/doc/hal/src/main.dox b/doc/hal/src/main.dox
index cd8f735cc..3a96776bb 100644
--- a/doc/hal/src/main.dox
+++ b/doc/hal/src/main.dox
@@ -18,7 +18,7 @@
 */
 
 /**
- * @mainpage Introdution
+ * @mainpage Introduction
  * @author Giovanni Di Sirio (gdisirio@users.sourceforge.net).
  *
  * <h2>Features</h2>
diff --git a/doc/nil/src/main.dox b/doc/nil/src/main.dox
index 7f137bd35..b28f0312c 100644
--- a/doc/nil/src/main.dox
+++ b/doc/nil/src/main.dox
@@ -18,7 +18,7 @@
 */
 
 /**
- * @mainpage Introdution
+ * @mainpage Introduction
  * @author Giovanni Di Sirio (gdisirio@users.sourceforge.net).
  *
  * <h2>Why Nil?</h2>
diff --git a/doc/rt/src/main.dox b/doc/rt/src/main.dox
index 2d222d347..1338ec6e3 100644
--- a/doc/rt/src/main.dox
+++ b/doc/rt/src/main.dox
@@ -18,7 +18,7 @@
 */
 
 /**
- * @mainpage Introdution
+ * @mainpage Introduction
  * @author Giovanni Di Sirio (gdisirio@users.sourceforge.net).
  *
  * <h2>Chibi ?</h2>