diff --git a/appendix/waifu2x-nocuda/lib/settings.lua b/appendix/waifu2x-nocuda/lib/settings.lua
index 56f894d..3ea818c 100644
--- a/appendix/waifu2x-nocuda/lib/settings.lua
+++ b/appendix/waifu2x-nocuda/lib/settings.lua
@@ -21,7 +21,7 @@ cmd:text("Options:")
 cmd:option("-seed", 11, 'fixed input seed')
 cmd:option("-data_dir", "./data", 'data directory')
 cmd:option("-test", "images/miku_small.png", 'test image file')
-cmd:option("-model_dir", "./models", 'model directory')
+cmd:option("-model_dir", "/usr/share/waifu2x/models", 'model directory')
 cmd:option("-method", "scale", '(noise|scale)')
 cmd:option("-noise_level", 1, '(1|2)')
 cmd:option("-scale", 2.0, 'scale')
diff --git a/appendix/waifu2x-nocuda/waifu2x.lua b/appendix/waifu2x-nocuda/waifu2x.lua
index 7afe284..d0b4f37 100644
--- a/appendix/waifu2x-nocuda/waifu2x.lua
+++ b/appendix/waifu2x-nocuda/waifu2x.lua
@@ -19,7 +19,7 @@ local function waifu2x()
    cmd:text("Options:")
    cmd:option("-i", "images/miku_small.png", 'path of input image')
    cmd:option("-o", "(auto)", 'path of output')
-   cmd:option("-model_dir", "./models", 'model directory')
+   cmd:option("-model_dir", "/usr/share/waifu2x/models", 'model directory')
    cmd:option("-m", "noise_scale", 'method (noise|scale|noise_scale)')
    cmd:option("-noise_level", 1, '(1|2)')
    cmd:option("-crop_size", 128, 'crop size')
diff --git a/src/main.cpp b/src/main.cpp
index ad1a2d4..b2a7ecc 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -52,7 +52,7 @@ int main(int argc, char** argv) {
 
 	TCLAP::ValueArg<std::string> cmdModelPath("", "model_dir",
 			"path to custom model directory (don't append last / )", false,
-			"models_rgb", "string", cmd);
+			"/usr/share/waifu2x/models_rgb", "string", cmd);
 
 	TCLAP::ValueArg<int> cmdNumberOfJobs("j", "jobs",
 			"number of threads launching at the same time", false, 0, "integer",