diff --git a/readme.md b/readme.md
index 44d3c58..4889e1b 100644
--- a/readme.md
+++ b/readme.md
@@ -3940,6 +3940,8 @@ Should be reasonably accurate if not close to fully open.
 ---
 <a name="Terminals"></a>
 ## Terminals
+Terminal blocks for power supplies and PCBs.
+
 [vitamins/terminal.scad](vitamins/terminal.scad) Implementation.
 
 [tests/terminals.scad](tests/terminals.scad) Code for this example.
diff --git a/vitamins/terminal.scad b/vitamins/terminal.scad
index b762dca..ccc606a 100644
--- a/vitamins/terminal.scad
+++ b/vitamins/terminal.scad
@@ -17,6 +17,8 @@
 // If not, see <https://www.gnu.org/licenses/>.
 //
 
+//! Terminal blocks for power supplies and PCBs.
+
 include <../core.scad>
 
 function terminal_block_pitch(type)   = type[0];    //! Pitch between screws