diff --git a/docs/source/examples_simple_2D.rst b/docs/source/examples_simple_2D.rst
index c54428a0..d676deab 100644
--- a/docs/source/examples_simple_2D.rst
+++ b/docs/source/examples_simple_2D.rst
@@ -1,5 +1,5 @@
 ****************************
-Introductary/basic 2D models
+Introductory/basic 2D models
 ****************************
 
 This section provides some general example models in 2D that demonstrate how to use certain features of gprMax. Each example comes with an input file which you can download and run.