diff --git a/README.txt b/README.txt
index 95f026d02..343f365e0 100644
--- a/README.txt
+++ b/README.txt
@@ -10,7 +10,7 @@ http://www.libsdl.org/
 
 Simple DirectMedia Layer is a cross-platform development library designed
 to provide low level access to audio, keyboard, mouse, joystick, and graphics
-hardware via OpenGL and DirectX. It is used by video playback software,
+hardware via OpenGL and Direct3D. It is used by video playback software,
 emulators, and popular games including Valve's award winning catalog
 and many Humble Bundle games.