diff --git a/include/Nazara/Core/Enums.hpp b/include/Nazara/Core/Enums.hpp
index 0c0530489..02039811b 100644
--- a/include/Nazara/Core/Enums.hpp
+++ b/include/Nazara/Core/Enums.hpp
@@ -79,7 +79,8 @@ namespace Nz
 
 		OpenMode_Append    = 0x01, // Disable writing on existing parts and put the cursor at the end
 		OpenMode_Lock      = 0x02, // Disable modifying the file before it is open
-		OpenMode_ReadOnly  = 0x04, // Open in read only
+		OpenMode_MustExit  = 0x04, // Fail if the file doesn't exists, even if opened in write mode
+		OpenMode_ReadOnly  = 0x08, // Open in read only
 		OpenMode_Text      = 0x10, // Open in text mod
 		OpenMode_Truncate  = 0x20, // Create the file if it doesn't exist and empty it if it exists
 		OpenMode_WriteOnly = 0x40, // Open in write only, create the file if it doesn't exist
@@ -105,7 +106,8 @@ namespace Nz
 	enum Plugin
 	{
 		Plugin_Assimp,
-		Plugin_FreeType
+
+		Plugin_Count
 	};
 
 	enum PrimitiveType
diff --git a/src/Nazara/Core/Win32/FileImpl.cpp b/src/Nazara/Core/Win32/FileImpl.cpp
index 8c479c798..688b87c99 100644
--- a/src/Nazara/Core/Win32/FileImpl.cpp
+++ b/src/Nazara/Core/Win32/FileImpl.cpp
@@ -64,7 +64,7 @@ namespace Nz
 		{
 			access |= GENERIC_READ;
 
-			if ((mode & OpenMode_WriteOnly) == 0)
+			if (mode & OpenMode_MustExit || (mode & OpenMode_WriteOnly) == 0)
 				openMode |= OPEN_EXISTING;
 		}
 		
@@ -77,6 +77,8 @@ namespace Nz
 
 			if (mode & OpenMode_Truncate)
 				openMode |= CREATE_ALWAYS;
+			else if (mode & OpenMode_MustExit)
+				openMode |= OPEN_EXISTING;
 			else
 				openMode |= OPEN_ALWAYS;
 		}