diff --git a/src/opengl/gltexture.cpp b/src/opengl/gltexture.cpp
index 82dbdefdbd..6e55df5ab3 100644
--- a/src/opengl/gltexture.cpp
+++ b/src/opengl/gltexture.cpp
@@ -182,7 +182,7 @@ void GLTexture::update(const QImage &image, const QPoint &offset, const QRect &s
             uploadFormat = QImage::Format_RGBA8888_Premultiplied;
         }
     }
-    bool useUnpack = context->supportsTextureUnpack() && image.format() == uploadFormat && !src.isNull();
+    bool useUnpack = image.format() == uploadFormat && !src.isNull();
 
     QImage im;
     if (useUnpack) {
diff --git a/src/opengl/openglcontext.cpp b/src/opengl/openglcontext.cpp
index 4aa1f3b81e..271fc8f386 100644
--- a/src/opengl/openglcontext.cpp
+++ b/src/opengl/openglcontext.cpp
@@ -87,7 +87,6 @@ OpenGlContext::OpenGlContext(bool EGL)
     , m_supportsTextureStorage(checkTextureStorageSupport(this))
     , m_supportsTextureSwizzle(checkTextureSwizzleSupport(this))
     , m_supportsARGB32Textures(!m_isOpenglES || hasOpenglExtension(QByteArrayLiteral("GL_EXT_texture_format_BGRA8888")))
-    , m_supportsTextureUnpack(!m_isOpenglES || hasOpenglExtension(QByteArrayLiteral("GL_EXT_unpack_subimage")))
     , m_supportsRGTextures(hasVersion(Version(3, 0)) || hasOpenglExtension(QByteArrayLiteral("GL_ARB_texture_rg")) || hasOpenglExtension(QByteArrayLiteral("GL_EXT_texture_rg")))
     , m_supports16BitTextures(!m_isOpenglES || hasOpenglExtension(QByteArrayLiteral("GL_EXT_texture_norm16")))
     , m_supportsBlits(!m_isOpenglES || hasVersion(Version(3, 0)))
@@ -195,11 +194,6 @@ bool OpenGlContext::supportsARGB32Textures() const
     return m_supportsARGB32Textures;
 }
 
-bool OpenGlContext::supportsTextureUnpack() const
-{
-    return m_supportsTextureUnpack;
-}
-
 bool OpenGlContext::supportsRGTextures() const
 {
     return m_supportsRGTextures;
@@ -266,8 +260,9 @@ bool OpenGlContext::checkSupported() const
     const bool supportsNonPowerOfTwoTextures = m_isOpenglES || hasOpenglExtension("GL_ARB_texture_non_power_of_two");
     const bool supports3DTextures = !m_isOpenglES || hasVersion(Version(3, 0)) || hasOpenglExtension("GL_OES_texture_3D");
     const bool supportsFBOs = m_isOpenglES || hasVersion(Version(3, 0)) || hasOpenglExtension("GL_ARB_framebuffer_object") || hasOpenglExtension(QByteArrayLiteral("GL_EXT_framebuffer_object"));
+    const bool supportsUnpack = !m_isOpenglES || hasOpenglExtension(QByteArrayLiteral("GL_EXT_unpack_subimage"));
 
-    if (!supportsGLSL || !supportsNonPowerOfTwoTextures || !supports3DTextures || !supportsFBOs) {
+    if (!supportsGLSL || !supportsNonPowerOfTwoTextures || !supports3DTextures || !supportsFBOs || !supportsUnpack) {
         return false;
     }
     // some old hardware only supports very limited shaders. To prevent the shaders KWin uses later on from not working,
diff --git a/src/opengl/openglcontext.h b/src/opengl/openglcontext.h
index 4cdb52b418..0e7150b86c 100644
--- a/src/opengl/openglcontext.h
+++ b/src/opengl/openglcontext.h
@@ -59,7 +59,6 @@ public:
     bool supportsTextureSwizzle() const;
     bool supportsTextureStorage() const;
     bool supportsARGB32Textures() const;
-    bool supportsTextureUnpack() const;
     bool supportsRGTextures() const;
     bool supports16BitTextures() const;
     bool supportsBlits() const;
@@ -113,7 +112,6 @@ protected:
     const bool m_supportsTextureStorage;
     const bool m_supportsTextureSwizzle;
     const bool m_supportsARGB32Textures;
-    const bool m_supportsTextureUnpack;
     const bool m_supportsRGTextures;
     const bool m_supports16BitTextures;
     const bool m_supportsBlits;