diff --git a/addons/material_maker/engine/gen_image.gd b/addons/material_maker/engine/gen_image.gd
index dbc0a315..a7795eb1 100644
--- a/addons/material_maker/engine/gen_image.gd
+++ b/addons/material_maker/engine/gen_image.gd
@@ -37,8 +37,9 @@ func get_filetime(file_path : String) -> int:
 
 func get_adjusted_uv(uv : String) -> String:
 	if get_parameter("fix_ar"):
-		var ar : float = texture.get_height()
-		ar /= texture.get_width()
+		var ar : float = 1.0
+		if texture.get_width() != 0 and texture.get_height() != 0:
+			ar = texture.get_width() / texture.get_width()
 		uv = "((%s) - vec2(0.0, %f)) * vec2(1.0, %f)" % [uv, (1-ar)/2, 1/ar]
 
 	if get_parameter("clamp"):