diff --git a/include/cglm/struct/sphere.h b/include/cglm/struct/sphere.h
index 95c36bc..9859c72 100644
--- a/include/cglm/struct/sphere.h
+++ b/include/cglm/struct/sphere.h
@@ -42,9 +42,9 @@ glms_sphere_radii(vec4s s) {
  */
 CGLM_INLINE
 vec4s
-glms_sphere_transform(vec4s s, mat4 m) {
+glms_sphere_transform(vec4s s, mat4s m) {
   vec4s r;
-  glm_sphere_transform(s.raw, m, r.raw);
+  glm_sphere_transform(s.raw, m.raw, r.raw);
   return r;
 }