diff --git a/projects/fmcomms2/ac701/system_constr.xdc b/projects/fmcomms2/ac701/system_constr.xdc
index d09a91497..4a50da3eb 100644
--- a/projects/fmcomms2/ac701/system_constr.xdc
+++ b/projects/fmcomms2/ac701/system_constr.xdc
@@ -62,4 +62,4 @@ set_property  -dict {PACKAGE_PIN  E23  IOSTANDARD LVCMOS25} [get_ports spi_miso]
 # clocks
 
 create_clock -name rx_clk       -period  4 [get_ports rx_clk_in_p]
-create_clock -name ad9361_clk   -period  4 [get_pins i_system_wrapper/system_i/axi_ad9361/clk]
+
diff --git a/projects/fmcomms2/kc705/system_constr.xdc b/projects/fmcomms2/kc705/system_constr.xdc
index 11f60f7a6..d9346816b 100644
--- a/projects/fmcomms2/kc705/system_constr.xdc
+++ b/projects/fmcomms2/kc705/system_constr.xdc
@@ -62,4 +62,4 @@ set_property  -dict {PACKAGE_PIN  AJ29  IOSTANDARD LVCMOS25} [get_ports spi_miso
 # clocks
 
 create_clock -name rx_clk       -period  4 [get_ports rx_clk_in_p]
-create_clock -name ad9361_clk   -period  4 [get_pins i_system_wrapper/system_i/axi_ad9361/clk]
+
diff --git a/projects/fmcomms2/mitx045/system_constr.xdc b/projects/fmcomms2/mitx045/system_constr.xdc
index 201c2dad1..403bbc60f 100644
--- a/projects/fmcomms2/mitx045/system_constr.xdc
+++ b/projects/fmcomms2/mitx045/system_constr.xdc
@@ -61,4 +61,4 @@ set_property  -dict {PACKAGE_PIN  W28   IOSTANDARD LVCMOS25} [get_ports spi_miso
 # clocks
 
 create_clock -name rx_clk       -period  4.00 [get_ports rx_clk_in_p]
-create_clock -name ad9361_clk   -period  4.00 [get_pins i_system_wrapper/system_i/axi_ad9361/clk]
+
diff --git a/projects/fmcomms2/vc707/system_constr.xdc b/projects/fmcomms2/vc707/system_constr.xdc
index 8abdecd19..f6280bd2b 100644
--- a/projects/fmcomms2/vc707/system_constr.xdc
+++ b/projects/fmcomms2/vc707/system_constr.xdc
@@ -62,4 +62,4 @@ set_property  -dict {PACKAGE_PIN  H31  IOSTANDARD LVCMOS18} [get_ports spi_miso]
 # clocks
 
 create_clock -name rx_clk       -period  4 [get_ports rx_clk_in_p]
-create_clock -name ad9361_clk   -period  4 [get_pins i_system_wrapper/system_i/axi_ad9361/clk]
+
diff --git a/projects/fmcomms2/zc702/system_constr.xdc b/projects/fmcomms2/zc702/system_constr.xdc
index 22bdc9892..2e9fc432f 100644
--- a/projects/fmcomms2/zc702/system_constr.xdc
+++ b/projects/fmcomms2/zc702/system_constr.xdc
@@ -61,7 +61,6 @@ set_property  -dict {PACKAGE_PIN  C18  IOSTANDARD LVCMOS25} [get_ports spi_miso]
 # clocks
 
 create_clock -name rx_clk       -period  4 [get_ports rx_clk_in_p]
-create_clock -name ad9361_clk   -period  4 [get_pins i_system_wrapper/system_i/axi_ad9361/clk]
 
 # spi pmod J63
 
diff --git a/projects/fmcomms2/zc706/system_constr.xdc b/projects/fmcomms2/zc706/system_constr.xdc
index 0e6a6a83a..2509dc955 100644
--- a/projects/fmcomms2/zc706/system_constr.xdc
+++ b/projects/fmcomms2/zc706/system_constr.xdc
@@ -73,5 +73,4 @@ set_property  -dict {PACKAGE_PIN  AC18  IOSTANDARD LVCMOS25} [get_ports gpio_mux
 # clocks
 
 create_clock -name rx_clk       -period  4.00 [get_ports rx_clk_in_p]
-create_clock -name ad9361_clk   -period  4.00 [get_pins i_system_wrapper/system_i/axi_ad9361/clk]
 
diff --git a/projects/fmcomms2/zed/system_constr.xdc b/projects/fmcomms2/zed/system_constr.xdc
index f623f7d6c..c1a741f22 100644
--- a/projects/fmcomms2/zed/system_constr.xdc
+++ b/projects/fmcomms2/zed/system_constr.xdc
@@ -71,4 +71,4 @@ set_property  -dict {PACKAGE_PIN  AB9    IOSTANDARD LVCMOS33}     [get_ports gpi
 # clocks
 
 create_clock -name rx_clk       -period  4 [get_ports rx_clk_in_p]
-create_clock -name ad9361_clk   -period  4 [get_pins i_system_wrapper/system_i/axi_ad9361/clk]
+