diff --git a/src/lib/ector/gl/ector_renderer_gl.eo b/src/lib/ector/gl/ector_renderer_gl.eo
index 3a9dcd6671..82fb387a87 100644
--- a/src/lib/ector/gl/ector_renderer_gl.eo
+++ b/src/lib/ector/gl/ector_renderer_gl.eo
@@ -7,7 +7,7 @@ abstract Ector.Renderer.GL (Ector.Renderer)
          return: bool;
 	 params {
 	    @in flags: uint64;
-	    @in vertex: GLshort*;
+	    @in vertex: ptr(GLshort);
 	    @in vertex_count: uint;
 	    @in mul_col: uint;
 	 }