diff --git a/IO/src/ImageFile.cpp b/IO/src/ImageFile.cpp
index bbb0576..bb9e852 100644
--- a/IO/src/ImageFile.cpp
+++ b/IO/src/ImageFile.cpp
@@ -204,7 +204,7 @@ unsigned char *ImageFile::ReadFileData(const CHAR *filename) {
   uint64 totalBytesLeft = fileSize;
   uint32 bytesToRead = uint32(std::min(totalBytesLeft, uint64(1 << 31)));
   int32 bytesRead;
-  while((bytesRead = fstr.Read(rawData, uint32(fileSize))) >= 0) {
+  while((bytesRead = fstr.Read(rawData, uint32(fileSize))) > 0) {
 	  totalBytesRead += bytesRead;
 	  totalBytesLeft -= bytesRead;
   }