diff --git a/kitty/shaders/graphics.slang b/kitty/shaders/graphics.slang
index cc088de02..309cfff3e 100644
--- a/kitty/shaders/graphics.slang
+++ b/kitty/shaders/graphics.slang
@@ -7,7 +7,7 @@ import alpha_blend;
 import utils;
 
 extern static const bool is_alpha_mask = false;
-extern static const bool texture_is_not_premultiplied = false;
+extern static const bool texture_is_not_premultiplied = true;
 
 
 struct VSOutput
diff --git a/kitty/shaders/slang.py b/kitty/shaders/slang.py
index 2669549ee..8e5aae2ec 100644
--- a/kitty/shaders/slang.py
+++ b/kitty/shaders/slang.py
@@ -279,7 +279,7 @@ class SlangFile(NamedTuple):
             case 'graphics.slang':
                 yield s()
                 yield s('alpha_mask', is_alpha_mask='true')
-                yield s('premult', texture_is_not_premultiplied='true')
+                yield s('premult', texture_is_not_premultiplied='false')
             case 'cell.slang':
                 d = cell_variant()
                 seen = set()