diff --git a/source/Irrlicht/CImageLoaderJPG.cpp b/source/Irrlicht/CImageLoaderJPG.cpp
index 6ebe4fc1..6b51bd98 100644
--- a/source/Irrlicht/CImageLoaderJPG.cpp
+++ b/source/Irrlicht/CImageLoaderJPG.cpp
@@ -128,7 +128,7 @@ bool CImageLoaderJPG::isALoadableFileFormat(io::IReadFile* file) const
 	if (!(file && file->seek(0)))
 		return false;
 	unsigned char header[3];
-	int headerLen = file->read(header, sizeof(header));
+	size_t headerLen = file->read(header, sizeof(header));
 	return headerLen >= 3 && !memcmp(header, "\xFF\xD8\xFF", 3);
 	#endif
 }