diff --git a/effects/shadow/shadow.cpp b/effects/shadow/shadow.cpp
index 3577ddc6b2..0aab471db5 100644
--- a/effects/shadow/shadow.cpp
+++ b/effects/shadow/shadow.cpp
@@ -667,6 +667,8 @@ void ShadowEffect::drawShadowQuadOpenGL( GLTexture *texture, QVector<float> vert
         shader->setUniform("opacity", opacity);
         shader->setUniform("saturation", saturation);
         shader->setUniform("brightness", brightness);
+        shader->setUniform("textureWidth", 1.0f);
+        shader->setUniform("textureHeight", 1.0f);
         }
     texture->bind();
     texture->enableNormalizedTexCoords();