diff --git a/litedram/init.py b/litedram/init.py
index 169a286..6baf31c 100644
--- a/litedram/init.py
+++ b/litedram/init.py
@@ -508,6 +508,7 @@ def get_sdram_phy_c_header(phy_settings, timing_settings):
     if phytype in ["USDDRPHY", "USPDDRPHY"]:
         r += "#define SDRAM_PHY_WRITE_LEVELING_REINIT\n"
     if phytype in ["USDDRPHY", "USPDDRPHY", "A7DDRPHY", "K7DDRPHY", "V7DDRPHY", "ECP5DDRPHY"]:
+        r += "#define SDRAM_PHY_WRITE_LATENCY_CALIBRATION_CAPABLE\n"
         r += "#define SDRAM_PHY_READ_LEVELING_CAPABLE\n"
 
     # Define number of modules/delays/bitslips