diff --git a/util/EGLWindow.cpp b/util/EGLWindow.cpp
index 0d9d0b616..a7c34a3f7 100644
--- a/util/EGLWindow.cpp
+++ b/util/EGLWindow.cpp
@@ -184,7 +184,7 @@ bool EGLWindow::initializeGL(OSWindow *osWindow)
     eglGetConfigAttrib(mDisplay, mConfig, EGL_RED_SIZE, &mRedBits);
     eglGetConfigAttrib(mDisplay, mConfig, EGL_GREEN_SIZE, &mGreenBits);
     eglGetConfigAttrib(mDisplay, mConfig, EGL_BLUE_SIZE, &mBlueBits);
-    eglGetConfigAttrib(mDisplay, mConfig, EGL_ALPHA_SIZE, &mBlueBits);
+    eglGetConfigAttrib(mDisplay, mConfig, EGL_ALPHA_SIZE, &mAlphaBits);
     eglGetConfigAttrib(mDisplay, mConfig, EGL_DEPTH_SIZE, &mDepthBits);
     eglGetConfigAttrib(mDisplay, mConfig, EGL_STENCIL_SIZE, &mStencilBits);