diff --git a/cfg/windows.cfg b/cfg/windows.cfg
index 49c46f625..e9eb887e2 100644
--- a/cfg/windows.cfg
+++ b/cfg/windows.cfg
@@ -985,8 +985,8 @@
   <resource>
     <alloc init="true">_wfopen</alloc>
     <alloc init="true">_tfopen</alloc>
-    <alloc init="true">_wfopen_s</alloc>
-    <alloc init="true">_tfopen_s</alloc>
+    <alloc init="true" arg="1">_wfopen_s</alloc>
+    <alloc init="true" arg="1">_tfopen_s</alloc>
     <dealloc>fclose</dealloc>
   </resource>
   <memory>
diff --git a/test/testmemleak.cpp b/test/testmemleak.cpp
index 887e43ae3..e642e4ed2 100644
--- a/test/testmemleak.cpp
+++ b/test/testmemleak.cpp
@@ -5977,6 +5977,7 @@ private:
         LOAD_LIB_2(settings.library, "windows.cfg");
 
         TEST_CASE(openfileNoLeak);
+        TEST_CASE(returnValueNotUsed_tfopen_s);
     }
 
     void openfileNoLeak() {
@@ -5992,6 +5993,24 @@ private:
               "}");
         TODO_ASSERT_EQUALS("", "[test.c:1]: (error) Resource leak: hFile\n", errout.str());
     }
+
+    void returnValueNotUsed_tfopen_s() {
+        check("bool LoadFile(LPCTSTR filename) {\n"
+              "  FILE *fp = NULL;\n"
+              "  _tfopen_s(&fp, filename, _T(\"rb\"));\n"
+              "  if (!fp)\n"
+              "      return false;\n"
+              "  fclose(fp);\n"
+              "  return true;\n"
+              "}");
+        ASSERT_EQUALS("", errout.str());
+
+        check("bool LoadFile(LPCTSTR filename) {\n"
+              "  FILE *fp = NULL;\n"
+              "  _tfopen_s(&fp, filename, _T(\"rb\"));\n"
+              "}");
+        TODO_ASSERT_EQUALS("[test.c:3]: (error) Resource leak: fp\n", "", errout.str());
+    }
 };
 
 REGISTER_TEST(TestMemleakWindows)