diff --git a/src/FurnaceRecipe.cpp b/src/FurnaceRecipe.cpp
index 90b478285..d53854950 100644
--- a/src/FurnaceRecipe.cpp
+++ b/src/FurnaceRecipe.cpp
@@ -135,7 +135,7 @@ void cFurnaceRecipe::ReloadRecipes(void)
 
 void cFurnaceRecipe::PrintParseError(unsigned int a_Line, size_t a_Position, const AString & a_CharactersMissing)
 {
-	LOGWARN("Error parsing furnace recipes at line %i pos %i: missing '%s'", a_Line, a_Position, a_CharactersMissing.c_str());
+	LOGWARN("Error parsing furnace recipes at line %i pos " SIZE_T_FMT ": missing '%s'", a_Line, a_Position, a_CharactersMissing.c_str());
 }
 
 
@@ -179,7 +179,7 @@ bool cFurnaceRecipe::ReadMandatoryNumber(AString::size_type & a_Begin, const ASt
 bool cFurnaceRecipe::ReadOptionalNumbers(AString::size_type & a_Begin, const AString & a_DelimiterOne, const AString & a_DelimiterTwo, const AString & a_Text, unsigned int a_Line, int & a_ValueOne, int & a_ValueTwo, bool a_IsLastValue)
 {
 	// TODO: replace atoi with std::stoi
-	unsigned int End, Begin = a_Begin;
+	AString::size_type End, Begin = a_Begin;
 
 	End = a_Text.find_first_of(a_DelimiterOne, Begin);
 	if (End != AString::npos)
diff --git a/src/FurnaceRecipe.h b/src/FurnaceRecipe.h
index cddcc215f..ab78b6051 100644
--- a/src/FurnaceRecipe.h
+++ b/src/FurnaceRecipe.h
@@ -42,7 +42,7 @@ private:
 	void ClearRecipes(void);
 
 	/** Calls LOGWARN with the line, position, and error */
-	inline static void PrintParseError(unsigned int a_Line, size_t a_Position, const AString & a_CharactersMissing);
+	static void PrintParseError(unsigned int a_Line, size_t a_Position, const AString & a_CharactersMissing);
 
 	/** Reads a number from a string given, starting at a given position and ending at a delimiter given
 	Updates beginning position to the delimiter found + 1, and updates the value to the one read
@@ -60,7 +60,7 @@ private:
 	static bool ReadOptionalNumbers(AString::size_type & a_Begin, const AString & a_DelimiterOne, const AString & a_DelimiterTwo, const AString & a_Text, unsigned int a_Line, int & a_ValueOne, int & a_ValueTwo, bool a_IsLastValue = false);
 
 	/** Uses std::all_of to determine if a string contains only digits */
-	inline static bool DoesStringContainOnlyNumbers(const AString & a_String);
+	static bool DoesStringContainOnlyNumbers(const AString & a_String);
 
 
 	struct sFurnaceRecipeState;