diff --git a/test/custom-formatter-test.cc b/test/custom-formatter-test.cc
index d33b12f5..968cce2b 100644
--- a/test/custom-formatter-test.cc
+++ b/test/custom-formatter-test.cc
@@ -5,6 +5,12 @@
 //
 // For the license information refer to format.h.
 
+#ifdef _MSC_VER
+#  ifndef _CRT_SECURE_NO_WARNINGS
+#    define _CRT_SECURE_NO_WARNINGS
+#  endif
+#endif
+
 #include "fmt/format.h"
 #include "gtest-extra.h"