diff --git a/src/lib/sixel.c b/src/lib/sixel.c
index e01e78db4..30390e349 100644
--- a/src/lib/sixel.c
+++ b/src/lib/sixel.c
@@ -394,7 +394,7 @@ int sixel_blit_inner(ncplane* nc, int leny, int lenx, sixeltable* stab,
     return -1;
   }
   unsigned cols = lenx / bargs->pixel.celldimx + !!(lenx % bargs->pixel.celldimx);
-  unsigned rows = leny / bargs->pixel.celldimy + !!(leny % bargs->pixel.celldimx);
+  unsigned rows = leny / bargs->pixel.celldimy + !!(leny % bargs->pixel.celldimy);
   if(plane_blit_sixel(nc, buf, size, rows, cols, bargs->pixel.sprixelid) < 0){
     free(buf);
     return -1;