diff --git a/docs/source/vec4.rst b/docs/source/vec4.rst
index a1b7250..947a2da 100644
--- a/docs/source/vec4.rst
+++ b/docs/source/vec4.rst
@@ -24,6 +24,7 @@ Functions:
 1. :c:func:`glm_vec4`
 #. :c:func:`glm_vec4_copy3`
 #. :c:func:`glm_vec4_copy`
+#. :c:func:`glm_vec4_ucopy`
 #. :c:func:`glm_vec4_zero`
 #. :c:func:`glm_vec4_one`
 #. :c:func:`glm_vec4_dot`
@@ -89,6 +90,16 @@ Functions documentation
       | *[in]*  **v**     source
       | *[in]*  **dest**  destination
 
+.. c:function:: void  glm_vec4_ucopy(vec4 v, vec4 dest)
+
+    copy all members of [a] to [dest]
+
+    | alignment is not required
+
+    Parameters:
+      | *[in]*  **v**     source
+      | *[in]*  **dest**  destination
+
 .. c:function:: void  glm_vec4_zero(vec4 v)
 
     makes all members zero
diff --git a/include/cglm/vec4.h b/include/cglm/vec4.h
index d8d6b0a..d0221d4 100644
--- a/include/cglm/vec4.h
+++ b/include/cglm/vec4.h
@@ -25,6 +25,7 @@
    CGLM_INLINE void  glm_vec4(vec3 v3, float last, vec4 dest);
    CGLM_INLINE void  glm_vec4_copy3(vec4 a, vec3 dest);
    CGLM_INLINE void  glm_vec4_copy(vec4 v, vec4 dest);
+   CGLM_INLINE void  glm_vec4_ucopy(vec4 v, vec4 dest);
    CGLM_INLINE float glm_vec4_dot(vec4 a, vec4 b);
    CGLM_INLINE float glm_vec4_norm2(vec4 v);
    CGLM_INLINE float glm_vec4_norm(vec4 vec);
@@ -123,6 +124,8 @@ glm_vec4_copy(vec4 v, vec4 dest) {
 /*!
  * @brief copy all members of [a] to [dest]
  *
+ * alignment is not required
+ *
  * @param[in]  v    source
  * @param[out] dest destination
  */