diff --git a/bitmap2component/bitmap2cmp_gui.cpp b/bitmap2component/bitmap2cmp_gui.cpp
index 1759b6b8df..49c14cf92b 100644
--- a/bitmap2component/bitmap2cmp_gui.cpp
+++ b/bitmap2component/bitmap2cmp_gui.cpp
@@ -461,7 +461,7 @@ void BM2CMP_FRAME::Binarize( double aThreshold )
             auto alpha   = m_Greyscale_Image.HasAlpha() ?
                     m_Greyscale_Image.GetAlpha( x, y ) : wxALPHA_OPAQUE;
 
-            if( pixin < threshold || alpha < alpha_thresh )
+            if( pixin < threshold && alpha > alpha_thresh )
                 pixout = 0;
             else
                 pixout = 255;