diff --git a/database/DBcellcopy.c b/database/DBcellcopy.c
index d253ea08..3a173c6b 100644
--- a/database/DBcellcopy.c
+++ b/database/DBcellcopy.c
@@ -666,7 +666,7 @@ DBFlattenInPlace(use, dest, xMask, dolabels, toplabels, doclear)
 		scx.scx_y++;
 		scx.scx_x = use->cu_xlo;
 	    }
-	    else if (use->cu_yhi > use->cu_yhi)
+	    else if (use->cu_ylo > use->cu_yhi)
 	    {
 		scx.scx_y--;
 		scx.scx_x = use->cu_xlo;