diff --git a/example_soc/fpga/fpga_icebreaker.v b/example_soc/fpga/fpga_icebreaker.v
index 9970822..5c23f5e 100644
--- a/example_soc/fpga/fpga_icebreaker.v
+++ b/example_soc/fpga/fpga_icebreaker.v
@@ -74,9 +74,13 @@ activity_led #(
 );
 
 example_soc #(
-	.MUL_FAST    (1),
-	.EXTENSION_C (0),
-	.CSR_COUNTER (1)
+	.MUL_FAST      (1),
+	.EXTENSION_C   (0),
+	.EXTENSION_ZBA (0),
+	.EXTENSION_ZBB (0),
+	.EXTENSION_ZBC (0),
+	.EXTENSION_ZBS (0),
+	.CSR_COUNTER   (1)
 ) soc_u (
 	.clk            (clk_sys),
 	.rst_n          (rst_n_sys),
diff --git a/example_soc/soc/example_soc.v b/example_soc/soc/example_soc.v
index 96c5e24..6779e32 100644
--- a/example_soc/soc/example_soc.v
+++ b/example_soc/soc/example_soc.v
@@ -241,6 +241,10 @@ hazard3_cpu_1port #(
 	// instantiation of example_soc():
 	.EXTENSION_C     (EXTENSION_C),
 	.EXTENSION_M     (EXTENSION_M),
+	.EXTENSION_ZBA   (EXTENSION_ZBA),
+	.EXTENSION_ZBB   (EXTENSION_ZBB),
+	.EXTENSION_ZBC   (EXTENSION_ZBC),
+	.EXTENSION_ZBS   (EXTENSION_ZBS),
 	.CSR_COUNTER     (CSR_COUNTER),
 	.MVENDORID_VAL   (MVENDORID_VAL),
 	.MARCHID_VAL     (MARCHID_VAL),