diff --git a/lua/entities/gmod_wire_expression2/core/entity.lua b/lua/entities/gmod_wire_expression2/core/entity.lua
index 35ab046e93..9f3ba9676f 100644
--- a/lua/entities/gmod_wire_expression2/core/entity.lua
+++ b/lua/entities/gmod_wire_expression2/core/entity.lua
@@ -200,7 +200,7 @@ end
 
 --- Specific to env_sun because Source is dum. Use this to trace towards the sun or something.
 e2function vector sunDirection()
-	if not isValid(sun) then return { 0, 0, 0 } end
+	if not IsValid(sun) then return { 0, 0, 0 } end
 	return sun:GetKeyValues().sun_dir
 end