diff --git a/Source/Core/Core/HLE/HLE_OS.cpp b/Source/Core/Core/HLE/HLE_OS.cpp
index 56c81377a2..aa3fc590cc 100644
--- a/Source/Core/Core/HLE/HLE_OS.cpp
+++ b/Source/Core/Core/HLE/HLE_OS.cpp
@@ -24,6 +24,9 @@ enum class ParameterType : bool
 
 std::string GetStringVA(u32 str_reg = 3,
                         ParameterType parameter_type = ParameterType::ParameterList);
+void HLE_GeneralDebugPrint(ParameterType parameter_type);
+void HLE_LogDPrint(ParameterType parameter_type);
+void HLE_LogFPrint(ParameterType parameter_type);
 
 void HLE_OSPanic()
 {