diff --git a/src/libslic3r/Format/SL1.hpp b/src/libslic3r/Format/SL1.hpp
index 8ed9dc329..493550db4 100644
--- a/src/libslic3r/Format/SL1.hpp
+++ b/src/libslic3r/Format/SL1.hpp
@@ -8,6 +8,8 @@
 #include "libslic3r/Zipper.hpp"
 #include "libslic3r/PrintConfig.hpp"
 
+struct indexed_triangle_set;
+
 namespace Slic3r {
 
 class SL1Archive: public SLAArchive {
diff --git a/src/libslic3r/Format/SL1_SVG.cpp b/src/libslic3r/Format/SL1_SVG.cpp
index a7a8c9ed6..372348283 100644
--- a/src/libslic3r/Format/SL1_SVG.cpp
+++ b/src/libslic3r/Format/SL1_SVG.cpp
@@ -2,6 +2,7 @@
 #include "SLA/RasterBase.hpp"
 #include "libslic3r/LocalesUtils.hpp"
 #include "libslic3r/ClipperUtils.hpp"
+#include "libslic3r/BoundingBox.hpp"
 
 #include <limits>
 #include <cstdint>