diff --git a/data/shaders/instanced_object_pass.vert b/data/shaders/instanced_object_pass.vert
index 3fb5e19e2..50b1ad36e 100644
--- a/data/shaders/instanced_object_pass.vert
+++ b/data/shaders/instanced_object_pass.vert
@@ -21,6 +21,7 @@ in vec3 Position;
 in vec3 Normal;
 in vec4 Color;
 in vec2 Texcoord;
+in vec2 SecondTexcoord;
 in vec3 Tangent;
 in vec3 Bitangent;