diff --git a/packages/edge-curve/src/index.ts b/packages/edge-curve/src/index.ts
index 67b2cc5e5..7ca4ea654 100644
--- a/packages/edge-curve/src/index.ts
+++ b/packages/edge-curve/src/index.ts
@@ -19,7 +19,7 @@ export default class EdgeCurveProgram<
 > extends EdgeProgram<(typeof UNIFORMS)[number], N, E, G> {
   getDefinition() {
     return {
-      VERTICES: 4,
+      VERTICES: 6,
       VERTEX_SHADER_SOURCE,
       FRAGMENT_SHADER_SOURCE,
       METHOD: WebGLRenderingContext.TRIANGLES,
@@ -40,6 +40,8 @@ export default class EdgeCurveProgram<
         [0, 1],
         [0, -1],
         [1, 1],
+        [0, -1],
+        [1, 1],
         [1, -1],
       ],
     };