diff --git a/litex_boards/targets/gsd_orangecrab.py b/litex_boards/targets/gsd_orangecrab.py
index 1dff143..bca2238 100755
--- a/litex_boards/targets/gsd_orangecrab.py
+++ b/litex_boards/targets/gsd_orangecrab.py
@@ -181,6 +181,7 @@ class BaseSoC(SoCCore):
             self.submodules.ddrphy = ECP5DDRPHY(
                 pads         = ddram_pads,
                 sys_clk_freq = sys_clk_freq,
+                dm_remapping = {0:1, 1:0},
                 cmd_delay    = 0 if sys_clk_freq > 64e6 else 100)
             self.ddrphy.settings.rtt_nom = "disabled"
             if hasattr(ddram_pads, "vccio"):