diff --git a/Source/Core/Common/Src/StringUtil.cpp b/Source/Core/Common/Src/StringUtil.cpp
index 4de1fa71cc..e5a42dc3fb 100644
--- a/Source/Core/Common/Src/StringUtil.cpp
+++ b/Source/Core/Common/Src/StringUtil.cpp
@@ -449,3 +449,14 @@ std::string ThS(int Integer, bool Unsigned)
 	}
 	return sbuf;
 }
+
+void NormalizeDirSep(std::string* str)
+{
+#ifdef _WIN32
+	int i;
+	while ((i = (int)str->find_first_of('\\')) >= 0)
+	{
+		str->replace(i, 1, DIR_SEP);
+	}
+#endif
+}
\ No newline at end of file
diff --git a/Source/Core/Common/Src/StringUtil.h b/Source/Core/Common/Src/StringUtil.h
index 3dc1eebe98..4dbcc7ff8e 100644
--- a/Source/Core/Common/Src/StringUtil.h
+++ b/Source/Core/Common/Src/StringUtil.h
@@ -73,6 +73,6 @@ int ChooseStringFrom(const char* str, const char* * items);
 // filehelper
 bool SplitPath(const std::string& full_path, std::string* _pPath, std::string* _pFilename, std::string* _pExtension);
 void BuildCompleteFilename(std::string& _CompleteFilename, const std::string& _Path, const std::string& _Filename);
-
+void NormalizeDirSep(std::string* str);
 
 #endif // _STRINGUTIL_H_
diff --git a/Source/Core/DolphinWX/Src/GameListCtrl.cpp b/Source/Core/DolphinWX/Src/GameListCtrl.cpp
index 03045bcfa9..f0e3d7cfcf 100644
--- a/Source/Core/DolphinWX/Src/GameListCtrl.cpp
+++ b/Source/Core/DolphinWX/Src/GameListCtrl.cpp
@@ -384,7 +384,21 @@ void CGameListCtrl::ScanForISOs()
 			for (u32 j = 0; j < FST_Temp.children.size(); j++)
 			{
 				if (FST_Temp.children.at(j).isDirectory)
-					Directories.push_back(FST_Temp.children.at(j).physicalName.c_str());
+				{
+					bool duplicate = false;
+					NormalizeDirSep(&(FST_Temp.children.at(j).physicalName));
+					for (u32 k = 0; k < Directories.size(); k++)
+					{
+						NormalizeDirSep(&Directories.at(k));
+						if (strcmp(Directories.at(k).c_str(), FST_Temp.children.at(j).physicalName.c_str()) == 0)
+						{
+							duplicate = true;
+							break;
+						}
+					}
+					if (!duplicate)
+						Directories.push_back(FST_Temp.children.at(j).physicalName.c_str());
+				}
 			}
 		}
 	}