diff --git a/src/plugins/screencast/outputscreencastsource.cpp b/src/plugins/screencast/outputscreencastsource.cpp
index c37f918f00..45439dfce5 100644
--- a/src/plugins/screencast/outputscreencastsource.cpp
+++ b/src/plugins/screencast/outputscreencastsource.cpp
@@ -36,11 +36,6 @@ OutputScreenCastSource::~OutputScreenCastSource()
     pause();
 }
 
-bool OutputScreenCastSource::hasAlphaChannel() const
-{
-    return true;
-}
-
 quint32 OutputScreenCastSource::drmFormat() const
 {
     return DRM_FORMAT_ARGB8888;
diff --git a/src/plugins/screencast/outputscreencastsource.h b/src/plugins/screencast/outputscreencastsource.h
index 6b795e0f60..a416e50347 100644
--- a/src/plugins/screencast/outputscreencastsource.h
+++ b/src/plugins/screencast/outputscreencastsource.h
@@ -24,7 +24,6 @@ public:
     ~OutputScreenCastSource() override;
 
     uint refreshRate() const override;
-    bool hasAlphaChannel() const override;
     QSize textureSize() const override;
     quint32 drmFormat() const override;
 
diff --git a/src/plugins/screencast/regionscreencastsource.cpp b/src/plugins/screencast/regionscreencastsource.cpp
index 1d4aa7226e..0632ecc5a9 100644
--- a/src/plugins/screencast/regionscreencastsource.cpp
+++ b/src/plugins/screencast/regionscreencastsource.cpp
@@ -60,11 +60,6 @@ QSize RegionScreenCastSource::textureSize() const
     return m_region.size() * m_scale;
 }
 
-bool RegionScreenCastSource::hasAlphaChannel() const
-{
-    return true;
-}
-
 quint32 RegionScreenCastSource::drmFormat() const
 {
     return DRM_FORMAT_ARGB8888;
diff --git a/src/plugins/screencast/regionscreencastsource.h b/src/plugins/screencast/regionscreencastsource.h
index 5a1809aeb3..c081dd6b1a 100644
--- a/src/plugins/screencast/regionscreencastsource.h
+++ b/src/plugins/screencast/regionscreencastsource.h
@@ -38,7 +38,6 @@ public:
     ~RegionScreenCastSource() override;
 
     quint32 drmFormat() const override;
-    bool hasAlphaChannel() const override;
     QSize textureSize() const override;
     uint refreshRate() const override;
 
diff --git a/src/plugins/screencast/screencastsource.h b/src/plugins/screencast/screencastsource.h
index bb92497a9e..c9627c2fb5 100644
--- a/src/plugins/screencast/screencastsource.h
+++ b/src/plugins/screencast/screencastsource.h
@@ -24,7 +24,6 @@ public:
     explicit ScreenCastSource(QObject *parent = nullptr);
 
     virtual uint refreshRate() const = 0;
-    virtual bool hasAlphaChannel() const = 0;
     virtual quint32 drmFormat() const = 0;
     virtual QSize textureSize() const = 0;
 
diff --git a/src/plugins/screencast/windowscreencastsource.cpp b/src/plugins/screencast/windowscreencastsource.cpp
index 034c9d308a..52ec1a1dbb 100644
--- a/src/plugins/screencast/windowscreencastsource.cpp
+++ b/src/plugins/screencast/windowscreencastsource.cpp
@@ -46,11 +46,6 @@ quint32 WindowScreenCastSource::drmFormat() const
     return DRM_FORMAT_ARGB8888;
 }
 
-bool WindowScreenCastSource::hasAlphaChannel() const
-{
-    return true;
-}
-
 QSize WindowScreenCastSource::textureSize() const
 {
     return m_window->clientGeometry().size().toSize();
@@ -58,7 +53,7 @@ QSize WindowScreenCastSource::textureSize() const
 
 void WindowScreenCastSource::render(QImage *target)
 {
-    const auto offscreenTexture = GLTexture::allocate(hasAlphaChannel() ? GL_RGBA8 : GL_RGB8, textureSize());
+    const auto offscreenTexture = GLTexture::allocate(GL_RGBA8, textureSize());
     if (!offscreenTexture) {
         return;
     }
diff --git a/src/plugins/screencast/windowscreencastsource.h b/src/plugins/screencast/windowscreencastsource.h
index e87c352412..7f69fd0c22 100644
--- a/src/plugins/screencast/windowscreencastsource.h
+++ b/src/plugins/screencast/windowscreencastsource.h
@@ -24,7 +24,6 @@ public:
     ~WindowScreenCastSource() override;
 
     quint32 drmFormat() const override;
-    bool hasAlphaChannel() const override;
     QSize textureSize() const override;
     uint refreshRate() const override;