diff --git a/library/util_i2c_mixer/util_i2c_mixer_ip.tcl b/library/util_i2c_mixer/util_i2c_mixer_ip.tcl
index 518a6ab29..0c164c5cc 100644
--- a/library/util_i2c_mixer/util_i2c_mixer_ip.tcl
+++ b/library/util_i2c_mixer/util_i2c_mixer_ip.tcl
@@ -9,5 +9,17 @@ adi_ip_files util_i2c_mixer [list \
 
 adi_ip_properties_lite util_i2c_mixer
 
-ipx::save_core [ipx::current_core]
 
+adi_add_bus "upstream" "slave" \
+	"xilinx.com:interface:iic_rtl:1.0" \
+	"xilinx.com:interface:iic:1.0" \
+	[list \
+		{"upstream_scl_I" "SCL_O"} \
+		{"upstream_scl_O" "SCL_I"} \
+		{"upstream_scl_T" "SCL_T"} \
+		{"upstream_sda_I" "SDA_O"} \
+		{"upstream_sda_O" "SDA_I"} \
+		{"upstream_sda_T" "SDA_T"} \
+	 ]
+
+ipx::save_core [ipx::current_core]