diff --git a/src/insets/InsetPhantom.cpp b/src/insets/InsetPhantom.cpp
index f7a9b45d9a..a21a2c2d0f 100644
--- a/src/insets/InsetPhantom.cpp
+++ b/src/insets/InsetPhantom.cpp
@@ -309,6 +309,8 @@ docstring InsetPhantom::toolTip(BufferView const &, int, int) const
 
 void InsetPhantom::latex(otexstream & os, OutputParams const & runparams) const
 {
+	if (runparams.moving_arg)
+        	os << "\\protect";
 	if (params_.type == InsetPhantomParams::Phantom)
 		os << "\\phantom{";
 	else if (params_.type == InsetPhantomParams::HPhantom)
diff --git a/status.21x b/status.21x
index bf36dc4e94..2ee6a30cb8 100644
--- a/status.21x
+++ b/status.21x
@@ -69,6 +69,9 @@ What's new
 
 - Do not output \protect unnecessarily in subfigure contents (bug 9421).
 
+- Do \protect phantoms in fragile environments (such as captions)
+  (bug 9456).
+
 - Fix LaTeX error with font sizes in caption.
 
 - Fix wrong listings preamble encoding (bug 9382).