3 files changed, 4 insertions, 4 deletions
diff --git a/src/glx/apple/apple_xgl_api_stereo.c b/src/glx/apple/apple_xgl_api_stereo.c
index 4b21aaf79ef..0d2f6fa6531 100644
--- a/src/glx/apple/apple_xgl_api_stereo.c
+++ b/src/glx/apple/apple_xgl_api_stereo.c
@@ -54,7 +54,7 @@ __applegl_glDrawBuffer(GLenum mode)
 {
    struct glx_context * gc = __glXGetCurrentContext();
 
-   if (gc && apple_glx_context_uses_stereo(gc->driContext)) {
+   if (gc != &dummyContext && apple_glx_context_uses_stereo(gc->driContext)) {
       GLenum buf[2];
       GLsizei n = 0;
 
@@ -89,7 +89,7 @@ __applegl_glDrawBuffers(GLsizei n, const GLenum * bufs)
 {
    struct glx_context * gc = __glXGetCurrentContext();
 
-   if (gc && apple_glx_context_uses_stereo(gc->driContext)) {
+   if (gc != &dummyContext && apple_glx_context_uses_stereo(gc->driContext)) {
       GLenum newbuf[n + 2];
       GLsizei i, outi = 0;
       bool have_back = false;
diff --git a/src/glx/apple/apple_xgl_api_viewport.c b/src/glx/apple/apple_xgl_api_viewport.c
index 281c90c6bbd..c40061df490 100644
--- a/src/glx/apple/apple_xgl_api_viewport.c
+++ b/src/glx/apple/apple_xgl_api_viewport.c
@@ -41,7 +41,7 @@ __applegl_glViewport(GLint x, GLint y, GLsizei width, GLsizei height)
    struct glx_context *gc = __glXGetCurrentContext();
    Display *dpy = glXGetCurrentDisplay();
 
-   if (gc && gc->driContext)
+   if (gc != &dummyContext && gc->driContext)
       apple_glx_context_update(dpy, gc->driContext);
 
    __ogl_framework_api->Viewport(x, y, width, height);
diff --git a/src/glx/glxcmds.c b/src/glx/glxcmds.c
index 8191da03616..ebb8bc6af7d 100644
--- a/src/glx/glxcmds.c
+++ b/src/glx/glxcmds.c
@@ -820,7 +820,7 @@ glXSwapBuffers(Display * dpy, GLXDrawable drawable)
 {
 #ifdef GLX_USE_APPLEGL
    struct glx_context * gc = __glXGetCurrentContext();
-   if(gc && apple_glx_is_current_drawable(dpy, gc->driContext, drawable)) {
+   if(gc != &DummyContext && apple_glx_is_current_drawable(dpy, gc->driContext, drawable)) {
       apple_glx_swap_buffers(gc->driContext);
    } else {
       __glXSendError(dpy, GLXBadCurrentWindow, 0, X_GLXSwapBuffers, false);