diff --git a/library/altera/common/ad_cmos_in.v b/library/altera/common/ad_cmos_in.v
index 5a3d77034..cf723784e 100644
--- a/library/altera/common/ad_cmos_in.v
+++ b/library/altera/common/ad_cmos_in.v
@@ -39,7 +39,6 @@
 
 module ad_cmos_in #(
 
-  parameter   SINGLE_ENDED = 0,
   parameter   DEVICE_TYPE = 0,
   parameter   IODELAY_CTRL = 0,
   parameter   IODELAY_GROUP = "dev_if_delay_group") (
diff --git a/library/altera/common/ad_cmos_out.v b/library/altera/common/ad_cmos_out.v
index cdec954dd..3ff0e0755 100644
--- a/library/altera/common/ad_cmos_out.v
+++ b/library/altera/common/ad_cmos_out.v
@@ -40,7 +40,6 @@
 module __ad_cmos_out__ #(
 
   parameter   DEVICE_TYPE = 0,
-  parameter   SINGLE_ENDED = 0,
   parameter   IODELAY_ENABLE = 0,
   parameter   IODELAY_CTRL = 0,
   parameter   IODELAY_GROUP = "dev_if_delay_group") (
diff --git a/library/axi_ad9361/altera/axi_ad9361_cmos_if.v b/library/axi_ad9361/altera/axi_ad9361_cmos_if.v
index 5e6ecd9f3..1341444d7 100644
--- a/library/axi_ad9361/altera/axi_ad9361_cmos_if.v
+++ b/library/axi_ad9361/altera/axi_ad9361_cmos_if.v
@@ -350,7 +350,6 @@ module axi_ad9361_cmos_if #(
   generate
   for (l_inst = 0; l_inst <= 11; l_inst = l_inst + 1) begin: g_rx_data
   ad_cmos_in #(
-    .SINGLE_ENDED (1),
     .DEVICE_TYPE (DEVICE_TYPE),
     .IODELAY_CTRL (0),
     .IODELAY_GROUP (IO_DELAY_GROUP))
@@ -372,7 +371,6 @@ module axi_ad9361_cmos_if #(
   // receive frame interface, ibuf -> idelay -> iddr
 
   ad_cmos_in #(
-    .SINGLE_ENDED (1),
     .DEVICE_TYPE (DEVICE_TYPE),
     .IODELAY_CTRL (1),
     .IODELAY_GROUP (IO_DELAY_GROUP))
@@ -395,7 +393,6 @@ module axi_ad9361_cmos_if #(
   for (l_inst = 0; l_inst <= 11; l_inst = l_inst + 1) begin: g_tx_data
   ad_cmos_out #(
     .DEVICE_TYPE (DEVICE_TYPE),
-    .SINGLE_ENDED (1),
     .IODELAY_ENABLE (DAC_IODELAY_ENABLE),
     .IODELAY_CTRL (0),
     .IODELAY_GROUP (IO_DELAY_GROUP))
@@ -418,7 +415,6 @@ module axi_ad9361_cmos_if #(
 
   ad_cmos_out #(
     .DEVICE_TYPE (DEVICE_TYPE),
-    .SINGLE_ENDED (1),
     .IODELAY_ENABLE (DAC_IODELAY_ENABLE),
     .IODELAY_CTRL (0),
     .IODELAY_GROUP (IO_DELAY_GROUP))
@@ -439,7 +435,6 @@ module axi_ad9361_cmos_if #(
 
   ad_cmos_out #(
     .DEVICE_TYPE (DEVICE_TYPE),
-    .SINGLE_ENDED (1),
     .IODELAY_ENABLE (DAC_IODELAY_ENABLE),
     .IODELAY_CTRL (0),
     .IODELAY_GROUP (IO_DELAY_GROUP))
@@ -460,7 +455,6 @@ module axi_ad9361_cmos_if #(
 
   ad_cmos_out #(
     .DEVICE_TYPE (DEVICE_TYPE),
-    .SINGLE_ENDED (1),
     .IODELAY_ENABLE (DAC_IODELAY_ENABLE),
     .IODELAY_CTRL (0),
     .IODELAY_GROUP (IO_DELAY_GROUP))
@@ -481,7 +475,6 @@ module axi_ad9361_cmos_if #(
 
   ad_cmos_out #(
     .DEVICE_TYPE (DEVICE_TYPE),
-    .SINGLE_ENDED (1),
     .IODELAY_ENABLE (DAC_IODELAY_ENABLE),
     .IODELAY_CTRL (0),
     .IODELAY_GROUP (IO_DELAY_GROUP))