diff --git a/docs/c-runtime-library/reference/tmpnam-s-wtmpnam-s.md b/docs/c-runtime-library/reference/tmpnam-s-wtmpnam-s.md
index bb547ff8fe..9250f38469 100644
--- a/docs/c-runtime-library/reference/tmpnam-s-wtmpnam-s.md
+++ b/docs/c-runtime-library/reference/tmpnam-s-wtmpnam-s.md
@@ -96,7 +96,7 @@ For more compatibility information, see [Compatibility](../compatibility.md).
 
 int main( void )
 {
-   char name1[L_tmpnam_s];
+   char name1[L_tmpnam_s + 1];
    errno_t err;
    int i;