diff --git a/data/shaders/flipparticle.vert b/data/shaders/flipparticle.vert
index 7b479ec9f..0ea2e7901 100644
--- a/data/shaders/flipparticle.vert
+++ b/data/shaders/flipparticle.vert
@@ -12,6 +12,7 @@ in float anglespeed;
 
 out float lf;
 out vec2 tc;
+out vec3 pc;
 
 void main(void)
 {
@@ -57,4 +58,5 @@ void main(void)
 
 	vec4 viewpos = ViewMatrix * vec4(newposition + newquadcorner, 1.0);
 	gl_Position = ProjectionMatrix * viewpos;
+	pc = vec3(1.);
 }