diff --git a/changelog/3.80.1/CHANGELOG-v3.80.1.md b/changelog/3.80.1/CHANGELOG-v3.80.1.md
index 1f5c5ff1e..dfe963eca 100644
--- a/changelog/3.80.1/CHANGELOG-v3.80.1.md
+++ b/changelog/3.80.1/CHANGELOG-v3.80.1.md
@@ -5,3 +5,4 @@
 * Fix `RenderTexture` crashing in the presence of a light.
 * Fix failure to restore compressed textures after WebGL context loss.
 * Fix a single WebGL error, with no visual side-effects, from occurring while calling `Shader.setRenderToTexture()` after the game has started running. Actually, the root cause was leaving new WebGL textures bound after creation.
+* Ensure that `TextureSource.setFlipY` always updates the texture.
diff --git a/src/textures/TextureSource.js b/src/textures/TextureSource.js
index 2a026c06b..80a6eb086 100644
--- a/src/textures/TextureSource.js
+++ b/src/textures/TextureSource.js
@@ -306,7 +306,10 @@ var TextureSource = new Class({
     {
         if (value === undefined) { value = true; }
 
+        if (value === this.flipY) { return this; }
+
         this.flipY = value;
+        this.update();
 
         return this;
     },