Use only one file for dummy implementations

[lyx.git] / src / graphics / PreviewImage.cpp

diff --git a/src/graphics/PreviewImage.cpp b/src/graphics/PreviewImage.cpp
index 12b03f0a776d54531a85bf0c2ff160d382405b5a..80e8e2013513575cc8dfc500a7d9f554d70c10b7 100644 (file)
--- a/src/graphics/PreviewImage.cpp
+++ b/src/graphics/PreviewImage.cpp
@@ -28,7 +28,7 @@ using namespace lyx::support;
 namespace lyx {
 namespace graphics {
 
-class PreviewImage::Impl : public boost::signals::trackable {
+class PreviewImage::Impl : public boost::signals2::trackable {
 public:
        ///
        Impl(PreviewImage & p, PreviewLoader & l,