diff --git a/CheckHeaders.cpp b/CheckHeaders.cpp
index b7db79aa0..5c5ed0e3a 100644
--- a/CheckHeaders.cpp
+++ b/CheckHeaders.cpp
@@ -180,6 +180,8 @@ void WarningIncludeHeader()
 
                     tok1 = tok1->next;
                 }
+                if (!tok1)
+                    break;
             }