diff --git a/src/Nazara/Core/Posix/FileImpl.cpp b/src/Nazara/Core/Posix/FileImpl.cpp
index 31c1ace73..f6e8b3bcc 100644
--- a/src/Nazara/Core/Posix/FileImpl.cpp
+++ b/src/Nazara/Core/Posix/FileImpl.cpp
@@ -118,6 +118,11 @@ namespace Nz
 		return lseek64(m_fileDescriptor, offset, moveMethod) != -1;
 	}
 
+	bool FileImpl::SetSize(UInt64 size)
+	{
+		return ftruncate64(m_fileDescriptor, size) != 0;
+	}
+
 	std::size_t FileImpl::Write(const void* buffer, std::size_t size)
 	{
 		lockf64(m_fileDescriptor, F_LOCK, size);
diff --git a/src/Nazara/Core/Posix/FileImpl.hpp b/src/Nazara/Core/Posix/FileImpl.hpp
index 844bebd29..4981a832e 100644
--- a/src/Nazara/Core/Posix/FileImpl.hpp
+++ b/src/Nazara/Core/Posix/FileImpl.hpp
@@ -39,6 +39,7 @@ namespace Nz
 			bool Open(const String& filePath, UInt32 mode);
 			std::size_t Read(void* buffer, std::size_t size);
 			bool SetCursorPos(CursorPosition pos, Int64 offset);
+			bool SetSize(UInt64 size);
 			std::size_t Write(const void* buffer, std::size_t size);
 
 			FileImpl& operator=(const FileImpl&) = delete;