diff --git a/fast-servo/linien-server-add-afe_ctrl-regs.patch b/fast-servo/linien-server-add-afe_ctrl-regs.patch
new file mode 100644
index 0000000..681d86d
--- /dev/null
+++ b/fast-servo/linien-server-add-afe_ctrl-regs.patch
@@ -0,0 +1,34 @@
+diff --git a/linien-server/linien_server/parameters.py b/linien-server/linien_server/parameters.py
+index 287f304..fe482d7 100644
+--- a/linien-server/linien_server/parameters.py
++++ b/linien-server/linien_server/parameters.py
+@@ -154,6 +154,16 @@ class Parameters:
+         `error_signal_2_max`.
+         """
+ 
++        # ------------------- FAST SERVO PARAMETERS ---------------------------------------
++        self.adc_afe_10x_gain_1 = Parameter(start=0, min_=0, max_=1, restorable=True)
++        self.adc_afe_10x_gain_2 = Parameter(start=0, min_=0, max_=1, restorable=True)
++        """
++        Configures Fast INs AFE Gain:
++            0 -->  1x Gain
++            1 --> 10x Gain
++        """
++        
++
+         # ------------------- GENERAL PARAMETERS ---------------------------------------
+ 
+         self.mod_channel = Parameter(start=0, min_=0, max_=1, restorable=True)
+diff --git a/linien-server/linien_server/registers.py b/linien-server/linien_server/registers.py
+index 365c254..2b8f697 100644
+--- a/linien-server/linien_server/registers.py
++++ b/linien-server/linien_server/registers.py
+@@ -173,6 +173,8 @@ class Registers:
+             gpio_n_do0_en=csrmap.signals.index("zero"),
+             gpio_n_do1_en=csrmap.signals.index("zero"),
+             logic_slow_decimation=16,
++            # Fast Servo Paramters
++            adc_afe_ctrl=(self.parameters.adc_afe_10x_gain_2.value << 1 | self.parameters.adc_afe_10x_gain_1.value)
+         )
+ 
+         for instruction_idx, [wait_for, peak_height] in enumerate(
diff --git a/flake.nix b/flake.nix
index 7826ac3..f1a7d50 100644
--- a/flake.nix
+++ b/flake.nix
@@ -34,6 +34,7 @@
             ./fast-servo/linien-client-ssh-port-change.patch
             ./fast-servo/linien-server-fast-servo.patch
             ./fast-servo/linien-server-cli.patch
+            ./fast-servo/linien-server-add-afe_ctrl-regs.patch
             ./fast-servo/linien-gateware-fast-servo.patch 
             ./fast-servo/linien-gateware-autolock-pipeline.patch
             ./fast-servo/linien-module-iir-coeff-width-set-to-18bit.patch