diff --git a/litex/soc/software/bios/sdram.c b/litex/soc/software/bios/sdram.c
index 4ffb108ee..409a7b812 100644
--- a/litex/soc/software/bios/sdram.c
+++ b/litex/soc/software/bios/sdram.c
@@ -210,17 +210,18 @@ void sdrwr(char *startaddr)
 
 #if defined (USDDRPHY)
 #define ERR_DDRPHY_DELAY 512
-#define ERR_DDRPHY_BITSLIP DFII_NPHASES*2
+#define ERR_DDRPHY_BITSLIP 8
+#define NBMODULES DFII_PIX_DATA_SIZE/2
 #elif defined (ECP5DDRPHY)
 #define ERR_DDRPHY_DELAY 8
 #define ERR_DDRPHY_BITSLIP 1
+#define NBMODULES DFII_PIX_DATA_SIZE/4
 #else
 #define ERR_DDRPHY_DELAY 32
-#define ERR_DDRPHY_BITSLIP DFII_NPHASES*2
+#define ERR_DDRPHY_BITSLIP 8
+#define NBMODULES DFII_PIX_DATA_SIZE/2
 #endif
 
-#define NBMODULES DFII_PIX_DATA_SIZE*DFII_NPHASES/8
-
 #ifdef CSR_DDRPHY_WLEVEL_EN_ADDR
 
 void sdrwlon(void)