diff --git a/src/vmath.nim b/src/vmath.nim
index 8319fde..2c2010c 100644
--- a/src/vmath.nim
+++ b/src/vmath.nim
@@ -898,12 +898,12 @@ proc `pos=`*[T](a: var GMat3[T], pos: GVec2[T]) =
   a[2, 1] = pos.y
 
 proc pos*[T](a: GMat4[T]): GVec3[T] =
-  gvec2[T](a[2].x, a[2].y, a[2].z)
+  gvec3[T](a[3].x, a[3].y, a[3].z)
 
 proc `pos=`*[T](a: var GMat4[T], pos: GVec3[T]) =
-  a[2, 0] = pos.x
-  a[2, 1] = pos.y
-  a[2, 2] = pos.z
+  a[3, 0] = pos.x
+  a[3, 1] = pos.y
+  a[3, 2] = pos.z
 
 proc `*`*[T](a, b: GMat3[T]): GMat3[T] =
   result[0, 0] = b[0, 0] * a[0, 0] + b[0, 1] * a[1, 0] + b[0, 2] * a[2, 0]
diff --git a/tests/test.nim b/tests/test.nim
index d2b7d5a..2d2c0bc 100644
--- a/tests/test.nim
+++ b/tests/test.nim
@@ -591,11 +591,20 @@ block:
     0.0, 0.0, 0.0, 1.0
   )
 
-  doAssert translate(vec2(1, 2)).pos == vec2(1, 2)
 
-  var translation = translate(vec2(1, 2))
-  translation.pos = vec2(3, 4)
-  doAssert translation.pos == vec2(3, 4)
+  block:
+    doAssert translate(vec2(1, 2)).pos == vec2(1, 2)
+
+    var translation = translate(vec2(1, 2))
+    translation.pos = vec2(3, 4)
+    doAssert translation.pos == vec2(3, 4)
+
+  block:
+    doAssert translate(vec3(1, 2, 3)).pos == vec3(1, 2, 3)
+
+    var translation = translate(vec3(1, 2, 3))
+    translation.pos = vec3(3, 4, 5)
+    doAssert translation.pos == vec3(3, 4, 5) 
 
 block:
   # Test basic vector mat4 and quat.