diff --git a/src/klotski_core/raw_code/convert.cc b/src/klotski_core/raw_code/convert.cc
index 1492961..82f6768 100644
--- a/src/klotski_core/raw_code/convert.cc
+++ b/src/klotski_core/raw_code/convert.cc
@@ -2,6 +2,7 @@
 #include "raw_code.h"
 
 using klotski::RawCode;
+using klotski::RawCodes;
 using klotski::RawCodeExp;
 using klotski::CommonCode;
 using klotski::CommonCodes;
@@ -46,8 +47,8 @@ RawCode RawCode::from_common_code(const std::string &common_code) {
 
 /// ---------------------------- Batch conversion -----------------------------
 
-CommonCodes RawCode::convert(const RawCodes &raw_codes) noexcept {
-    return {raw_codes.begin(), raw_codes.end()};
+RawCodes RawCode::convert(const CommonCodes &common_codes) noexcept {
+    return {common_codes.begin(), common_codes.end()};
 }
 
 /// ----------------------------- Basic Functions -----------------------------
diff --git a/src/klotski_core/raw_code/raw_code.h b/src/klotski_core/raw_code/raw_code.h
index 1b6473f..c370e9b 100644
--- a/src/klotski_core/raw_code/raw_code.h
+++ b/src/klotski_core/raw_code/raw_code.h
@@ -101,7 +101,7 @@ public:
     static RawCode from_common_code(const std::string &common_code);
 
     /// Batch conversion
-    static CommonCodes convert(const RawCodes &raw_codes) noexcept;
+    static RawCodes convert(const CommonCodes &common_codes) noexcept;
 
     /// Mirror functions
     RawCode to_vertical_mirror() const noexcept;