diff --git a/src/libs/gltf/gltf_data/lv_gltf_data_primitive.cpp b/src/libs/gltf/gltf_data/lv_gltf_data_primitive.cpp
index 0343dfea1d..4c20559547 100644
--- a/src/libs/gltf/gltf_data/lv_gltf_data_primitive.cpp
+++ b/src/libs/gltf/gltf_data/lv_gltf_data_primitive.cpp
@@ -35,7 +35,7 @@
  *   GLOBAL FUNCTIONS
  **********************/
 
-lv_gltf_primitive_t * lv_gltf_data_get_primitive_from_mesh(lv_gltf_mesh_data_t * mesh, uint64_t index)
+lv_gltf_primitive_t * lv_gltf_data_get_primitive_from_mesh(lv_gltf_mesh_data_t * mesh, size_t index)
 {
     return &(mesh->primitives[index]);
 }