diff --git a/src/c_wrapper/wrapper.cpp b/src/c_wrapper/wrapper.cpp
index 711d28c..accbac6 100644
--- a/src/c_wrapper/wrapper.cpp
+++ b/src/c_wrapper/wrapper.cpp
@@ -101,7 +101,7 @@ static OOPetrisAdditionalInformationField* information_value_to_c(const recorder
     }
 
     return std::visit(
-            helper::overloaded{ [return_value](const std::string& value) -> OOPetrisAdditionalInformationField* {
+            helper::Overloaded{ [return_value](const std::string& value) -> OOPetrisAdditionalInformationField* {
                                    auto* string = static_cast<char*>(OOPETRIS_MALLOC(value.size() + 1));
 
                                    if (string == nullptr) {
diff --git a/src/c_wrapper/wrapper.h b/src/c_wrapper/wrapper.h
index 8e6fe27..1811fe6 100644
--- a/src/c_wrapper/wrapper.h
+++ b/src/c_wrapper/wrapper.h
@@ -147,8 +147,8 @@ typedef struct {
 } OOPetrisTetrionRecord;
 
 typedef struct {
-    uint8_t x;
-    uint8_t y;
+    int8_t x;
+    int8_t y;
 } OOPetrisMinoPosition;