diff --git a/CHANGES b/CHANGES
index 49727447a..2dcaada88 100644
--- a/CHANGES
+++ b/CHANGES
@@ -3,7 +3,7 @@
 
 	[> Issues resolved
 	------------------
-	-
+	- wishbone/UpConverter: Fix SEL propagation.
 
 	[> Added Features
 	-----------------
diff --git a/litex/soc/interconnect/wishbone.py b/litex/soc/interconnect/wishbone.py
index 50d86d2a9..a57ebd711 100644
--- a/litex/soc/interconnect/wishbone.py
+++ b/litex/soc/interconnect/wishbone.py
@@ -294,7 +294,7 @@ class UpConverter(Module):
         for i in range(ratio):
             cases[i] = [
                 slave.adr.eq(master.adr[int(log2(ratio)):]),
-                slave.sel[i*dw_from//8:(i+1)*dw_from//8].eq(2**(dw_from//8) - 1),
+                slave.sel[i*dw_from//8:(i+1)*dw_from//8].eq(master.sel),
                 slave.dat_w[i*dw_from:(i+1)*dw_from].eq(master.dat_w),
                 master.dat_r.eq(slave.dat_r[i*dw_from:(i+1)*dw_from]),
         ]