diff --git a/litex/soc/software/liblitedram/accessors.c b/litex/soc/software/liblitedram/accessors.c
index 75f03cdde..fe9c88e1e 100644
--- a/litex/soc/software/liblitedram/accessors.c
+++ b/litex/soc/software/liblitedram/accessors.c
@@ -106,7 +106,7 @@ void write_rst_delay(int module) {
 /* Bitslip Delays Reset/Increment Functions                                   */
 /*----------------------------------------------------------------------------*/
 
-#if defined(SDRAM_PHY_BITSLIPS)
+#if defined(SDRAM_PHY_BITSLIPS) && defined(SDRAM_PHY_READ_LEVELING_CAPABLE)
 
 int read_dq_bitslip[SDRAM_PHY_MODULES];
 void read_inc_dq_bitslip(int module) {
@@ -121,6 +121,10 @@ void read_rst_dq_bitslip(int module) {
 	ddrphy_rdly_dq_bitslip_rst_write(1);
 }
 
+#endif  // defined(SDRAM_PHY_BITSLIPS) && defined(SDRAM_PHY_READ_LEVELING_CAPABLE)
+
+#if defined(SDRAM_PHY_BITSLIPS) && defined(SDRAM_PHY_WRITE_LEVELING_CAPABLE)
+
 int write_dq_bitslip[SDRAM_PHY_MODULES];
 void write_inc_dq_bitslip(int module) {
 	/* Increment bitslip */
@@ -134,7 +138,7 @@ void write_rst_dq_bitslip(int module) {
 	ddrphy_wdly_dq_bitslip_rst_write(1);
 }
 
-#endif // defined(SDRAM_PHY_BITSLIPS)
+#endif // defined(SDRAM_PHY_BITSLIPS) && defined(SDRAM_PHY_WRITE_LEVELING_CAPABLE)
 
 /*----------------------------------------------------------------------------*/
 /* SDRAM Module Selection Functions                                           */
diff --git a/litex/soc/software/liblitedram/accessors.h b/litex/soc/software/liblitedram/accessors.h
index c3525195c..18591d479 100644
--- a/litex/soc/software/liblitedram/accessors.h
+++ b/litex/soc/software/liblitedram/accessors.h
@@ -50,17 +50,22 @@ void write_rst_delay(int module);
 /* Bitslip Delays Reset/Increment Functions                                   */
 /*----------------------------------------------------------------------------*/
 
-#if defined(SDRAM_PHY_BITSLIPS)
+#if defined(SDRAM_PHY_BITSLIPS) && defined(SDRAM_PHY_READ_LEVELING_CAPABLE)
 
 extern int read_dq_bitslip[SDRAM_PHY_MODULES];
 void read_inc_dq_bitslip(int module);
 void read_rst_dq_bitslip(int module);
 
+#endif  // defined(SDRAM_PHY_BITSLIPS) && defined(SDRAM_PHY_READ_LEVELING_CAPABLE)
+
+
+#if defined(SDRAM_PHY_BITSLIPS) && defined(SDRAM_PHY_WRITE_LEVELING_CAPABLE)
+
 extern int write_dq_bitslip[SDRAM_PHY_MODULES];
 void write_inc_dq_bitslip(int module);
 void write_rst_dq_bitslip(int module);
 
-#endif // defined(SDRAM_PHY_BITSLIPS)
+#endif // defined(SDRAM_PHY_BITSLIPS) && defined(SDRAM_PHY_WRITE_LEVELING_CAPABLE)
 
 /*----------------------------------------------------------------------------*/
 /* SDRAM Module Selection Functions                                           */