diff --git a/auto/src/glewinfo_tail.c b/auto/src/glewinfo_tail.c
index ab87ed1..84e7a2a 100644
--- a/auto/src/glewinfo_tail.c
+++ b/auto/src/glewinfo_tail.c
@@ -58,7 +58,12 @@ int main (void)
     return 1;
   }
 #if defined(_WIN32)
+#if defined(_MSC_VER) && (_MSC_VER >= 1400)
+  if (fopen_s(&f, "glewinfo.txt", "w") != 0)
+    f = stdout;
+#else
   f = fopen("glewinfo.txt", "w");
+#endif
   if (f == NULL) f = stdout;
 #else
   f = stdout;
diff --git a/src/visualinfo.c b/src/visualinfo.c
index ed94cd2..ca2c585 100644
--- a/src/visualinfo.c
+++ b/src/visualinfo.c
@@ -146,8 +146,15 @@ main (int argc, char** argv)
   /* ---------------------------------------------------------------------- */
   /* open file */
 #if defined(_WIN32)
-  if (!displaystdout) 
+  if (!displaystdout)
+  {
+#if defined(_MSC_VER) && (_MSC_VER >= 1400)
+    if (fopen_s(&file, "visualinfo.txt", "w") != 0)
+      file = stdout;
+#else
     file = fopen("visualinfo.txt", "w");
+#endif
+  }
   if (file == NULL)
     file = stdout;
 #else
@@ -236,7 +243,11 @@ void PrintExtensions (const char* s)
       fprintf(file, "    %s\n", t);
       p++;
       i = (int)strlen(p);
+#if defined(_MSC_VER) && (_MSC_VER >= 1400)
+      strcpy_s(t, sizeof(t), p);
+#else
       strcpy(t, p);
+#endif
     }
     s++;
   }