diff --git a/src/opengl/qgl_egl.cpp b/src/opengl/qgl_egl.cpp
index 21047d7..db6be1c 100644
--- a/src/opengl/qgl_egl.cpp
+++ b/src/opengl/qgl_egl.cpp
@@ -81,7 +81,7 @@ void qt_eglproperties_set_glformat(QEglProperties& eglProperties, const QGLForma
     alphaSize = alphaSize > 0 ? alphaSize : 8;
     depthSize = depthSize > 0 ? depthSize : 24;
     stencilSize = stencilSize > 0 ? stencilSize : 8;
-    sampleCount = sampleCount > 0 ? sampleCount : 4;
+    sampleCount = sampleCount >= 0 ? sampleCount : 4;
 #else
     // QGLFormat uses a magic value of -1 to indicate "don't care", even when a buffer of that
     // type has been requested. So we must check QGLFormat's booleans too if size is -1:
diff --git a/src/opengl/qgl_symbian.cpp b/src/opengl/qgl_symbian.cpp
index 7d343f6..b8b9172 100644
--- a/src/opengl/qgl_symbian.cpp
+++ b/src/opengl/qgl_symbian.cpp
@@ -192,7 +192,7 @@ bool QGLContext::chooseContext(const QGLContext* shareContext) // almost same as
                 d->glFormat.setSamples(4);
             } else {
                 d->glFormat.setSampleBuffers(0);
-                d->glFormat.setSamples(1);
+                d->glFormat.setSamples(0);
             }
         }