diff --git a/src/main.cpp b/src/main.cpp
index b6bafa5..99cd211 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -54,8 +54,9 @@ int main()
     {
         const auto line_nc{remove_colors(line)};
         // Don't color +++ and --- lines
-        if (line.length() >= 2
-            && (line.length() < 3 || (line_nc[2] != '+' && line_nc[2] != '-')))
+        if (line_nc.length() >= 2
+            && (line_nc.length() < 3
+                || (line_nc[2] != '+' && line_nc[2] != '-')))
         {
             if (line_nc[1] == '+')
             {