diff --git a/Modules/IO/IOJPEG2000/src/otbJPEG2000ImageIO.cxx b/Modules/IO/IOJPEG2000/src/otbJPEG2000ImageIO.cxx
index 12fb3dbb55affc8a97a931d936f8c5675b3172f2..e98c1a7e3e0acb250c96ace2d20928bb14c27fef 100644
--- a/Modules/IO/IOJPEG2000/src/otbJPEG2000ImageIO.cxx
+++ b/Modules/IO/IOJPEG2000/src/otbJPEG2000ImageIO.cxx
@@ -920,7 +920,8 @@ unsigned int JPEG2000ImageIO::GetOverviewsCount()
     itkExceptionMacro(<< "Available resolutions in JPEG2000 is empty");
     }
 
-  return tempResList.size() - 1;
+  // count includes full resolution
+  return tempResList.size();
 }
 
 // Read image