diff --git a/Source/Core/Core/PowerPC/SignatureDB/SignatureDB.cpp b/Source/Core/Core/PowerPC/SignatureDB/SignatureDB.cpp
index a10cfc38a5..0f7e417612 100644
--- a/Source/Core/Core/PowerPC/SignatureDB/SignatureDB.cpp
+++ b/Source/Core/Core/PowerPC/SignatureDB/SignatureDB.cpp
@@ -18,7 +18,7 @@
 #include "Core/PowerPC/SignatureDB/DSYSignatureDB.h"
 
 std::unique_ptr<SignatureDBFormatHandler>
-SignatureDB::CreateFormatHandler(const std::string& file_path)
+SignatureDB::CreateFormatHandler(const std::string& file_path) const
 {
   if (StringEndsWith(file_path, ".csv"))
     return std::make_unique<CSVSignatureDB>();
@@ -31,7 +31,7 @@ bool SignatureDB::Load(const std::string& file_path)
   return handler->Load(file_path, m_database);
 }
 
-bool SignatureDB::Save(const std::string& file_path)
+bool SignatureDB::Save(const std::string& file_path) const
 {
   auto handler = CreateFormatHandler(file_path);
   return handler->Save(file_path, m_database);
@@ -53,7 +53,7 @@ bool SignatureDB::Save(const std::string& file_path)
   return hash;
 }*/
 
-void SignatureDB::List()
+void SignatureDB::List() const
 {
   for (const auto& entry : m_database)
   {
@@ -68,7 +68,7 @@ void SignatureDB::Clear()
   m_database.clear();
 }
 
-void SignatureDB::Apply(PPCSymbolDB* symbol_db)
+void SignatureDB::Apply(PPCSymbolDB* symbol_db) const
 {
   for (const auto& entry : m_database)
   {
@@ -92,13 +92,13 @@ void SignatureDB::Apply(PPCSymbolDB* symbol_db)
   symbol_db->Index();
 }
 
-void SignatureDB::Initialize(PPCSymbolDB* symbol_db, const std::string& prefix)
+void SignatureDB::Populate(const PPCSymbolDB* symbol_db, const std::string& filter)
 {
   for (const auto& symbol : symbol_db->Symbols())
   {
-    if ((prefix.empty() && (!symbol.second.name.empty()) &&
+    if ((filter.empty() && (!symbol.second.name.empty()) &&
          symbol.second.name.substr(0, 3) != "zz_" && symbol.second.name.substr(0, 1) != ".") ||
-        ((!prefix.empty()) && symbol.second.name.substr(0, prefix.size()) == prefix))
+        ((!filter.empty()) && symbol.second.name.substr(0, filter.size()) == filter))
     {
       DBFunc temp_dbfunc;
       temp_dbfunc.name = symbol.second.name;
diff --git a/Source/Core/Core/PowerPC/SignatureDB/SignatureDB.h b/Source/Core/Core/PowerPC/SignatureDB/SignatureDB.h
index d0f0c46231..0d64211de1 100644
--- a/Source/Core/Core/PowerPC/SignatureDB/SignatureDB.h
+++ b/Source/Core/Core/PowerPC/SignatureDB/SignatureDB.h
@@ -33,17 +33,17 @@ public:
 
   // Does not clear. Remember to clear first if that's what you want.
   bool Load(const std::string& file_path);
-  bool Save(const std::string& file_path);
+  bool Save(const std::string& file_path) const;
+  void List() const;
   void Clear();
-  void List();
 
-  void Initialize(PPCSymbolDB* func_db, const std::string& prefix = "");
-  void Apply(PPCSymbolDB* func_db);
+  void Populate(const PPCSymbolDB* func_db, const std::string& filter = "");
+  void Apply(PPCSymbolDB* func_db) const;
 
   static u32 ComputeCodeChecksum(u32 offsetStart, u32 offsetEnd);
 
 private:
-  std::unique_ptr<SignatureDBFormatHandler> CreateFormatHandler(const std::string& file_path);
+  std::unique_ptr<SignatureDBFormatHandler> CreateFormatHandler(const std::string& file_path) const;
   // Map from signature to function. We store the DB in this map because it optimizes the
   // most common operation - lookup. We don't care about ordering anyway.
   FuncDB m_database;
diff --git a/Source/Core/DolphinWX/Debugger/CodeWindowFunctions.cpp b/Source/Core/DolphinWX/Debugger/CodeWindowFunctions.cpp
index f271c8a979..c939126827 100644
--- a/Source/Core/DolphinWX/Debugger/CodeWindowFunctions.cpp
+++ b/Source/Core/DolphinWX/Debugger/CodeWindowFunctions.cpp
@@ -353,7 +353,7 @@ void CCodeWindow::OnSymbolsMenu(wxCommandEvent& event)
       if (!path.IsEmpty())
       {
         SignatureDB db;
-        db.Initialize(&g_symbolDB, prefix);
+        db.Populate(&g_symbolDB, prefix);
         db.Save(WxStrToStr(path));
         db.List();
       }
@@ -376,7 +376,7 @@ void CCodeWindow::OnSymbolsMenu(wxCommandEvent& event)
       if (!path.IsEmpty())
       {
         SignatureDB db;
-        db.Initialize(&g_symbolDB, prefix);
+        db.Populate(&g_symbolDB, prefix);
         db.List();
         db.Load(WxStrToStr(path));
         db.Save(WxStrToStr(path));