diff --git a/platform/linux.rs b/platform/linux.rs
index 2d305c2..179ff84 100644
--- a/platform/linux.rs
+++ b/platform/linux.rs
@@ -179,6 +179,7 @@ pub struct GraphicsContext {
 
 impl GraphicsContext {
     // Creates a new, possibly shared, GLX context.
+	#[fixed_stack_segment]
     fn new_possibly_shared(share_context: Option<GraphicsContext>) -> GraphicsContext {
         let (display, visual, pixmap) = GraphicsContext::create_display_visual_and_pixmap();
 
@@ -201,6 +202,7 @@ impl GraphicsContext {
         }
     }
 
+	#[fixed_stack_segment]
     fn create_display_visual_and_pixmap() -> (*Display, *XVisualInfo, GLXPixmap) {
         unsafe {
             // Get a connection.
@@ -251,6 +253,7 @@ impl GraphicsContextMethods<GLXContext> for GraphicsContext {
     }
 
     /// Makes this context the current context.
+	#[fixed_stack_segment]
     fn make_current(&self) {
         unsafe {
             let result = glXMakeContextCurrent(self.display,
diff --git a/platform/macos.rs b/platform/macos.rs
index 86c0482..c050680 100644
--- a/platform/macos.rs
+++ b/platform/macos.rs
@@ -39,6 +39,7 @@ pub struct GraphicsContext {
 
 impl GraphicsContext {
     /// Returns a new context, possibly shared with another context.
+    #[fixed_stack_segment]
     fn new_possibly_shared(share_context: Option<GraphicsContext>) -> GraphicsContext {
         unsafe {
             // Choose a pixel format.
@@ -90,6 +91,7 @@ impl GraphicsContextMethods<CGLContextObj> for GraphicsContext {
     }
 
     /// Makes this context the current context.
+    #[fixed_stack_segment]
     fn make_current(&self) {
         unsafe {
             let gl_error = CGLSetCurrentContext(*self.cgl_context.get());
@@ -165,6 +167,7 @@ pub fn init_texture() -> GLuint {
 }
 
 // Assumes the texture is already bound via gl2::bind_texture().
+#[fixed_stack_segment]
 pub fn bind_surface_to_texture(context: &GraphicsContext, surface: &IOSurface, size: Size2D<int>) {
     // FIXME: There should be safe wrappers for this.
     unsafe {