diff --git a/source/dng_lossless_jpeg.cpp b/source/dng_lossless_jpeg.cpp
index e3b0576..9d0d01a 100644
--- a/source/dng_lossless_jpeg.cpp
+++ b/source/dng_lossless_jpeg.cpp
@@ -2277,7 +2277,7 @@
 	
 	#if qSupportHasselblad_3FR
 	
-	if (info.Ss == 8)
+	if (info.Ss == 8 && (numCOL & 1) == 0)
 		{
 		
 		fHasselblad3FR = true;
@@ -2412,7 +2412,7 @@
         // For the rest of the column on this row, predictor
         // calculations are based on PSV. 
 
-     	if (compsInScan == 2 && info.Ss == 1)
+     	if (compsInScan == 2 && info.Ss == 1 && numCOL > 1)
     		{
     		
     		// This is the combination used by both the Canon and Kodak raw formats.