--- a/dom/canvas/WebGLContextGL.cpp
+++ b/dom/canvas/WebGLContextGL.cpp
@@ -165,19 +165,19 @@ WebGLContext::BindRenderbuffer(GLenum ta
         return;
 
     if (target != LOCAL_GL_RENDERBUFFER)
         return ErrorInvalidEnumInfo("bindRenderbuffer: target", target);
 
     if (!ValidateObjectAllowDeletedOrNull("bindRenderbuffer", wrb))
         return;
 
-    // silently ignore a deleted buffer
-    if (wrb && wrb->IsDeleted())
-        return;
+    if (wrb && wrb->IsDeleted()) {
+        return ErrorInvalidOperation("BindRenderbuffer: bind a deleted buffer");
+    }
 
     // Usually, we would now call into glBindRenderbuffer. However, since we have to
     // potentially emulate packed-depth-stencil, there's not a specific renderbuffer that
     // we know we should bind here.
     // Instead, we do all renderbuffer binding lazily.
 
     if (wrb) {
         wrb->mHasBeenBound = true;