1 files changed, 1 insertions, 0 deletions
diff --git a/src/dot.cpp b/src/dot.cpp
index 3cc7e2f..1bc1cf8 100644
--- a/src/dot.cpp
+++ b/src/dot.cpp
@@ -561,6 +561,7 @@ static QCString convertLabel(const QCString &l)
 {
   QCString result;
   const char *p=l.data();
+  if (p==0) return result;
   char c;
   while ((c=*p++))
   {