diff --git a/src/blt/std/format.cpp b/src/blt/std/format.cpp
index 600ab62..ccb4c4b 100644
--- a/src/blt/std/format.cpp
+++ b/src/blt/std/format.cpp
@@ -113,6 +113,7 @@ std::string blt::string::TableFormatter::generateSeparator(size_t size) {
         } else
             wholeWidthSeparator += "-";
     }
+    wholeWidthSeparator += "+";
     return wholeWidthSeparator;
 }