diff --git a/files/shaders/debug_vertex.glsl b/files/shaders/debug_vertex.glsl
index f68c3d6459..a26d2573cf 100644
--- a/files/shaders/debug_vertex.glsl
+++ b/files/shaders/debug_vertex.glsl
@@ -2,7 +2,7 @@
 
 uniform mat4 projectionMatrix;
 
-varying vec4 passColor;
+centroid varying vec4 passColor;
 
 void main()
 {