diff --git a/src/4.advanced_opengl/10.instancing/instancing_asteroids_instanced.cpp b/src/4.advanced_opengl/10.instancing/instancing_asteroids_instanced.cpp
index edfd731..304f9af 100644
--- a/src/4.advanced_opengl/10.instancing/instancing_asteroids_instanced.cpp
+++ b/src/4.advanced_opengl/10.instancing/instancing_asteroids_instanced.cpp
@@ -182,7 +182,7 @@ int main()
         for(GLuint i = 0; i < rock.meshes.size(); i++)
         {
             glBindVertexArray(rock.meshes[i].VAO);
-            glDrawElementsInstanced(GL_TRIANGLES, rock.meshes[i].vertices.size(), GL_UNSIGNED_INT, 0, amount);
+            glDrawElementsInstanced(GL_TRIANGLES, rock.meshes[i].indices.size(), GL_UNSIGNED_INT, 0, amount);
             glBindVertexArray(0);
         }
         // reset our texture binding