diff --git a/src/slic3r/GUI/MainFrame.cpp b/src/slic3r/GUI/MainFrame.cpp
index 1e22359ab..a148325dd 100644
--- a/src/slic3r/GUI/MainFrame.cpp
+++ b/src/slic3r/GUI/MainFrame.cpp
@@ -214,7 +214,8 @@ void MainFrame::update_title()
     if (idx_plus != build_id.npos) {
     	// Parse what is behind the '+'. If there is a number, then it is a build number after the label, and full build ID is shown.
     	int commit_after_label;
-    	if (! boost::starts_with(build_id.data() + idx_plus + 1, "UNKNOWN") && sscanf(build_id.data() + idx_plus + 1, "%d-", &commit_after_label) == 0) {
+    	if (! boost::starts_with(build_id.data() + idx_plus + 1, "UNKNOWN") && 
+            (build_id.at(idx_plus + 1) == '-' || sscanf(build_id.data() + idx_plus + 1, "%d-", &commit_after_label) == 0)) {
     		// It is a release build.
     		build_id.erase(build_id.begin() + idx_plus, build_id.end());    		
 #if defined(_WIN32) && ! defined(_WIN64)