diff --git a/src/libslic3r/SLAPrint.cpp b/src/libslic3r/SLAPrint.cpp
index 6dc4a46206..8238a266ee 100644
--- a/src/libslic3r/SLAPrint.cpp
+++ b/src/libslic3r/SLAPrint.cpp
@@ -588,6 +588,15 @@ std::string SLAPrint::validate(std::string*) const
     return "";
 }
 
+void SLAPrint::export_print(const std::string &fname, const ThumbnailsList &thumbnails, const std::string &projectname)
+{
+    if (m_archiver)
+        m_archiver->export_print(fname, *this, thumbnails, projectname);
+    else {
+        throw ExportError(format(_u8L("Unknown archive format: %s"), m_printer_config.sla_archive_format.value));
+    }
+}
+
 bool SLAPrint::invalidate_step(SLAPrintStep step)
 {
     bool invalidated = Inherited::invalidate_step(step);
diff --git a/src/libslic3r/SLAPrint.hpp b/src/libslic3r/SLAPrint.hpp
index bd8424ca78..126941d820 100644
--- a/src/libslic3r/SLAPrint.hpp
+++ b/src/libslic3r/SLAPrint.hpp
@@ -546,10 +546,7 @@ public:
 
     void export_print(const std::string    &fname,
                       const ThumbnailsList &thumbnails,
-                      const std::string    &projectname = "")
-    {
-        m_archiver->export_print(fname, *this, thumbnails, projectname);
-    }
+                      const std::string    &projectname = "");
     
 private: