diff --git a/back-in-out.glsl b/back-in-out.glsl
index dcdff90..3dfb318 100644
--- a/back-in-out.glsl
+++ b/back-in-out.glsl
@@ -2,7 +2,7 @@
 #define PI 3.141592653589793
 #endif
 
-float backOut(float t) {
+float backInOut(float t) {
   float f = t < 0.5
     ? 2.0 * t
     : 1.0 - (2.0 * t - 1.0);