diff --git a/src/libslic3r/libslic3r_version.h.in b/src/libslic3r/libslic3r_version.h.in
index dc843d723..15f5803db 100644
--- a/src/libslic3r/libslic3r_version.h.in
+++ b/src/libslic3r/libslic3r_version.h.in
@@ -7,5 +7,6 @@
 #define SLIC3R_BUILD_ID "@SLIC3R_BUILD_ID@"
 //#define SLIC3R_RC_VERSION "@SLIC3R_VERSION@"
 #define BBL_RELEASE_TO_PUBLIC @BBL_RELEASE_TO_PUBLIC@
+#define BBL_INTERNAL_TESTING @BBL_INTERNAL_TESTING@
 
 #endif /* __SLIC3R_VERSION_H */
diff --git a/src/slic3r/GUI/AboutDialog.cpp b/src/slic3r/GUI/AboutDialog.cpp
index fa99b15f7..2a09ae180 100644
--- a/src/slic3r/GUI/AboutDialog.cpp
+++ b/src/slic3r/GUI/AboutDialog.cpp
@@ -244,7 +244,11 @@ AboutDialog::AboutDialog()
     // version
     {
         vesizer->Add(0, FromDIP(165), 1, wxEXPAND, FromDIP(5));
+#if BBL_INTERNAL_TESTING
+        auto version_string = _L("Internal Version") + " " + std::string(SLIC3R_VERSION);
+#else
         auto version_string = _L("Version") + " " + std::string(SLIC3R_VERSION);
+#endif
         wxStaticText* version = new wxStaticText(this, wxID_ANY, version_string.c_str(), wxDefaultPosition, wxDefaultSize);
         wxFont version_font = GetFont();
         #ifdef __WXMSW__
diff --git a/src/slic3r/GUI/GUI_App.cpp b/src/slic3r/GUI/GUI_App.cpp
index c8916730b..6aabbc0e9 100644
--- a/src/slic3r/GUI/GUI_App.cpp
+++ b/src/slic3r/GUI/GUI_App.cpp
@@ -554,7 +554,11 @@ private:
             title = wxGetApp().is_editor() ? SLIC3R_APP_FULL_NAME : GCODEVIEWER_APP_NAME;
 
             // dynamically get the version to display
+#if BBL_INTERNAL_TESTING
+            version = _L("Internal Version") + " " + std::string(SLIC3R_VERSION);
+#else
             version = _L("Version") + " " + std::string(SLIC3R_VERSION);
+#endif
 
             // credits infornation
             credits =   title;