diff --git a/include/cglm/struct/vec3-ext.h b/include/cglm/struct/vec3-ext.h
index 212953f..f9ce728 100644
--- a/include/cglm/struct/vec3-ext.h
+++ b/include/cglm/struct/vec3-ext.h
@@ -26,6 +26,7 @@
    CGLM_INLINE vec3s glms_vec3_sign(vec3s v);
    CGLM_INLINE vec3s glms_vec3_abs(vec3s v);
    CGLM_INLINE vec3s glms_vec3_fract(vec3s v);
+   CGLM_INLINE vec3s glms_vec3_floor(vec3s v);
    CGLM_INLINE float glms_vec3_hadd(vec3s v);
    CGLM_INLINE vec3s glms_vec3_sqrt(vec3s v);
  */