diff --git a/examples/shallowwaterfriction/doc/main_intro.md b/examples/shallowwaterfriction/doc/main_intro.md
index 15c6b8515d544cf54a2ef9663e7732683fd49b9f..0843c042d108a448825284495e5e6d49667d005f 100644
--- a/examples/shallowwaterfriction/doc/main_intro.md
+++ b/examples/shallowwaterfriction/doc/main_intro.md
@@ -3,10 +3,9 @@
 We want to solve a shallow water flow problem in a rough
 channel to obtain the water table and
 compare it to the analytic solution. This is done with the
-`main()` function
+`main` function
 of the program which is defined in the file `main.cc` described below.
 
 The code documentation is structured as follows:
 
 [[_TOC_]]
-