diff --git a/src/graphics/post_processing.cpp b/src/graphics/post_processing.cpp
index 923a26a09..6f11e4e33 100644
--- a/src/graphics/post_processing.cpp
+++ b/src/graphics/post_processing.cpp
@@ -1072,7 +1072,7 @@ void PostProcessing::renderGaussian6Blur(const FrameBuffer &in_fbo,
     {
         auxiliary.bind();
         Gaussian6VBlurShader::getInstance()
-            ->render(in_fbo.getRTT()[0], in_fbo.getWidth(), in_fbo.getWidth(),
+            ->render(in_fbo.getRTT()[0], in_fbo.getWidth(), in_fbo.getHeight(),
                      sigma_v);
 
         in_fbo.bind();