diff --git a/shader/copy_img.comp b/shader/copy_img.comp
index 4fc74e6fe..875785f4c 100644
--- a/shader/copy_img.comp
+++ b/shader/copy_img.comp
@@ -2,7 +2,7 @@
 
 #extension GL_EXT_samplerless_texture_functions : enable
 
-layout(local_size_x = 8, local_size_x = 8) in;
+layout(local_size_x = 8, local_size_y = 8) in;
 
 layout(binding = 0) uniform writeonly image2D   dst;
 layout(binding = 1) uniform           texture2D src;