diff --git a/Frechet_distance/test/Frechet_distance/Frechet_distance_test.cpp b/Frechet_distance/test/Frechet_distance/Frechet_distance_test.cpp
index fb51cf3fd82..e53d39d3010 100644
--- a/Frechet_distance/test/Frechet_distance/Frechet_distance_test.cpp
+++ b/Frechet_distance/test/Frechet_distance/Frechet_distance_test.cpp
@@ -50,7 +50,7 @@ static void readCurve(std::ifstream& curve_file, TestCurve& curve)
     // Read everything into a stringstream.
     std::stringstream ss;
     ss << curve_file.rdbuf();
-    CGAL::set_ascii_mode(ss);
+    CGAL::IO::set_ascii_mode(ss);
 
     TestPoint p;
     auto ignore_count = (std::numeric_limits<std::streamsize>::max)();