diff --git a/example_soc/fpga/fpga_icebreaker.v b/example_soc/fpga/fpga_icebreaker.v
index 5c23f5e..200dff9 100644
--- a/example_soc/fpga/fpga_icebreaker.v
+++ b/example_soc/fpga/fpga_icebreaker.v
@@ -74,13 +74,16 @@ activity_led #(
 );
 
 example_soc #(
-	.MUL_FAST      (1),
+	.EXTENSION_A   (0),
 	.EXTENSION_C   (0),
+	.EXTENSION_M   (1),
+	.MUL_FAST      (0),
+	.MULH_FAST     (0),
 	.EXTENSION_ZBA (0),
 	.EXTENSION_ZBB (0),
 	.EXTENSION_ZBC (0),
 	.EXTENSION_ZBS (0),
-	.CSR_COUNTER   (1)
+	.CSR_COUNTER   (0)
 ) 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 de5e5fd..e1c339b 100644
--- a/example_soc/soc/example_soc.v
+++ b/example_soc/soc/example_soc.v
@@ -241,6 +241,7 @@ hazard3_cpu_1port #(
 	.NUM_IRQ         (1),
 	// Can be overridden from the defaults in hazard3_config.vh during
 	// instantiation of example_soc():
+	.EXTENSION_A     (EXTENSION_A),
 	.EXTENSION_C     (EXTENSION_C),
 	.EXTENSION_M     (EXTENSION_M),
 	.EXTENSION_ZBA   (EXTENSION_ZBA),