diff --git a/src/libkwineffects/kwinglutils.cpp b/src/libkwineffects/kwinglutils.cpp
index 8a93cdc413..6a002e9a67 100644
--- a/src/libkwineffects/kwinglutils.cpp
+++ b/src/libkwineffects/kwinglutils.cpp
@@ -333,7 +333,6 @@ void GLShader::resolveLocations()
     mFloatLocation[Saturation]    = uniformLocation("saturation");
 
     mColorLocation[Color] = uniformLocation("geometryColor");
-    mVec4Location[TextureClamp] = uniformLocation("textureClamp");
 
     mLocationsResolved = true;
 }
@@ -856,10 +855,6 @@ QByteArray ShaderManager::generateFragmentSource(ShaderTraits traits) const
     } else if (traits & ShaderTrait::UniformColor)
         stream << "uniform vec4 geometryColor;\n";
 
-    if (traits & ShaderTrait::ClampTexture) {
-        stream << "uniform vec4 textureClamp;\n";
-    }
-
     if (output != QByteArrayLiteral("gl_FragColor"))
         stream << "\nout vec4 " << output << ";\n";
 
@@ -867,11 +862,6 @@ QByteArray ShaderManager::generateFragmentSource(ShaderTraits traits) const
     if (traits & ShaderTrait::MapTexture) {
         stream << "vec2 texcoordC = texcoord0;\n";
 
-        if (traits & ShaderTrait::ClampTexture) {
-            stream << "texcoordC.x = clamp(texcoordC.x, textureClamp.x, textureClamp.z);\n";
-            stream << "texcoordC.y = clamp(texcoordC.y, textureClamp.y, textureClamp.w);\n";
-        }
-
         if (traits & (ShaderTrait::Modulate | ShaderTrait::AdjustSaturation)) {
             stream << "    vec4 texel = " << textureLookup << "(sampler, texcoordC);\n";
             if (traits & ShaderTrait::Modulate)
diff --git a/src/libkwineffects/kwinglutils.h b/src/libkwineffects/kwinglutils.h
index 498337228d..25136954ab 100644
--- a/src/libkwineffects/kwinglutils.h
+++ b/src/libkwineffects/kwinglutils.h
@@ -118,7 +118,6 @@ public:
 
     enum Vec4Uniform {
         ModulationConstant,
-        TextureClamp,
         Vec4UniformCount
     };
 
@@ -176,7 +175,6 @@ enum class ShaderTrait {
     UniformColor     = (1 << 1),
     Modulate         = (1 << 2),
     AdjustSaturation = (1 << 3),
-    ClampTexture     = (1 << 4),
 };
 
 Q_DECLARE_FLAGS(ShaderTraits, ShaderTrait)
diff --git a/src/plugins/scenes/opengl/scene_opengl.cpp b/src/plugins/scenes/opengl/scene_opengl.cpp
index 71e7da81d0..84eeb25856 100644
--- a/src/plugins/scenes/opengl/scene_opengl.cpp
+++ b/src/plugins/scenes/opengl/scene_opengl.cpp
@@ -1464,8 +1464,6 @@ void OpenGLWindow::performPaint(int mask, const QRegion &region, const WindowPai
     const QMatrix4x4 modelViewProjection = modelViewProjectionMatrix(mask, data);
     const QMatrix4x4 mvpMatrix = modelViewProjection * windowMatrix;
 
-    bool useX11TextureClamp = false;
-
     GLShader *shader = data.shader;
     GLenum filter;
 
@@ -1474,7 +1472,6 @@ void OpenGLWindow::performPaint(int mask, const QRegion &region, const WindowPai
     } else {
         const bool isTransformed = mask & (Effect::PAINT_WINDOW_TRANSFORMED |
                                            Effect::PAINT_SCREEN_TRANSFORMED);
-        useX11TextureClamp = isTransformed;
         if (isTransformed && options->glSmoothScale() != 0) {
             filter = GL_LINEAR;
         } else {
@@ -1484,9 +1481,6 @@ void OpenGLWindow::performPaint(int mask, const QRegion &region, const WindowPai
 
     if (!shader) {
         ShaderTraits traits = ShaderTrait::MapTexture;
-        if (useX11TextureClamp) {
-            traits |= ShaderTrait::ClampTexture;
-        }
 
         if (data.opacity() != 1.0 || data.brightness() != 1.0 || data.crossFadeProgress() != 1.0)
             traits |= ShaderTrait::Modulate;
@@ -1551,25 +1545,6 @@ void OpenGLWindow::performPaint(int mask, const QRegion &region, const WindowPai
         renderNode.texture->setWrapMode(GL_CLAMP_TO_EDGE);
         renderNode.texture->bind();
 
-        if (renderNode.leafType == ContentLeaf && useX11TextureClamp) {
-            // X11 windows are reparented to have their buffer in the middle of a larger texture
-            // holding the frame window.
-            // This code passes the texture geometry to the fragment shader
-            // any samples near the edge of the texture will be constrained to be
-            // at least half a pixel in bounds, meaning we don't bleed the transparent border
-            QRectF bufferContentRect = surfaceItem()->shape().boundingRect();
-            bufferContentRect.adjust(0.5, 0.5, -0.5, -0.5);
-            const QRect bufferGeometry = toplevel->bufferGeometry();
-
-            float leftClamp = bufferContentRect.left() / bufferGeometry.width();
-            float topClamp = bufferContentRect.top() / bufferGeometry.height();
-            float rightClamp = bufferContentRect.right() / bufferGeometry.width();
-            float bottomClamp = bufferContentRect.bottom() / bufferGeometry.height();
-            shader->setUniform(GLShader::TextureClamp, QVector4D({leftClamp, topClamp, rightClamp, bottomClamp}));
-        } else {
-            shader->setUniform(GLShader::TextureClamp, QVector4D({0, 0, 1, 1}));
-        }
-
         vbo->draw(region, primitiveType, renderNode.firstVertex,
                   renderNode.vertexCount, m_hardwareClipping);
     }