diff --git a/src/vmath.nim b/src/vmath.nim
index 26a37f8..e3eaa9b 100644
--- a/src/vmath.nim
+++ b/src/vmath.nim
@@ -360,7 +360,7 @@ proc yz*(a: Vec3): Vec2 {.inline.} =
   vec2(a.y, a.z)
 
 proc zx*(a: Vec3): Vec2 {.inline.} =
-  vec2(a.y, a.x)
+  vec2(a.z, a.x)
 
 proc zy*(a: Vec3): Vec2 {.inline.} =
   vec2(a.z, a.y)