diff --git a/include/dulcificum.h b/include/dulcificum.h
index e9c9d94..5d55c5e 100644
--- a/include/dulcificum.h
+++ b/include/dulcificum.h
@@ -12,6 +12,7 @@
 #include <range/v3/to_container.hpp>
 #include <range/v3/view/join.hpp>
 #include <range/v3/view/transform.hpp>
+#include <range/v3/view/c_str.hpp>
 
 #include <dulcificum/gcode/gcode_to_command.h>
 #include <dulcificum/gcode/parse.h>
@@ -30,7 +31,7 @@ namespace dulcificum
                         {
                             return dulcificum::miracle_jtp::toJson(*command).dump();
                         })
-                  | ranges::views::join(",\n") | ranges::to<std::string>();
+                  | ranges::views::join(ranges::views::c_str(",\n")) | ranges::to<std::string>();
     return fmt::format("[\n{}\n]", commands);
 }