diff --git a/gfx/thebes/GLContext.cpp b/gfx/thebes/GLContext.cpp
index c6b35e1aa99..1ff2c29b827 100644
--- a/gfx/thebes/GLContext.cpp
+++ b/gfx/thebes/GLContext.cpp
@@ -747,12 +747,12 @@ GLContext::UpdateActualFormat()
 {
     ContextFormat nf;
 
-    fGetIntegerv(LOCAL_GL_RED_BITS, (GLint*) &nf.alpha);
-    fGetIntegerv(LOCAL_GL_GREEN_BITS, (GLint*) &nf.alpha);
-    fGetIntegerv(LOCAL_GL_BLUE_BITS, (GLint*) &nf.alpha);
+    fGetIntegerv(LOCAL_GL_RED_BITS, (GLint*) &nf.red);
+    fGetIntegerv(LOCAL_GL_GREEN_BITS, (GLint*) &nf.green);
+    fGetIntegerv(LOCAL_GL_BLUE_BITS, (GLint*) &nf.blue);
     fGetIntegerv(LOCAL_GL_ALPHA_BITS, (GLint*) &nf.alpha);
     fGetIntegerv(LOCAL_GL_DEPTH_BITS, (GLint*) &nf.depth);
-    fGetIntegerv(LOCAL_GL_STENCIL_BITS, (GLint*) &nf.depth);
+    fGetIntegerv(LOCAL_GL_STENCIL_BITS, (GLint*) &nf.stencil);
 
     mActualFormat = nf;
 }