diff --git a/ortools/sat/swig_helper.h b/ortools/sat/swig_helper.h
index 521242062a..68cdd5d8d1 100644
--- a/ortools/sat/swig_helper.h
+++ b/ortools/sat/swig_helper.h
@@ -23,7 +23,7 @@ namespace operations_research {
 namespace sat {
 
 // Base class for SWIG director based on solution callbacks.
-// See http://www.i.org/Doc3.0/SWIGDocumentation.html#CSharp_directors.
+// See http://www.swig.org/Doc3.0/SWIGDocumentation.html#CSharp_directors.
 class SolutionCallback {
  public:
   virtual ~SolutionCallback() {}