diff --git a/CoreDocSpectrum.md b/CoreDocSpectrum.md
index d2ac7ab..aadc3fb 100644
--- a/CoreDocSpectrum.md
+++ b/CoreDocSpectrum.md
@@ -4,7 +4,7 @@ This page has operating instructions for the ZX Spectrum core.
 
 Get the [Core binaries here](https://github.com/mist-devel/mist-binaries/tree/master/cores/spectrum)
 
-The core supports the **Sinclair Interface 2** Joystick interface only.
+The core supports the **Sinclair Interface 2** joystick interface only.
 
 This core is cycle exact so it even displays the colour bars from the [Shock Megademo](http://www.worldofspectrum.org/infoseekid.cgi?id=0007726) and similar demos correctly.