diff --git a/flight/modules/Stabilization/altitudeloop.c b/flight/modules/Stabilization/altitudeloop.c
index 329990d0e..f54ed5740 100644
--- a/flight/modules/Stabilization/altitudeloop.c
+++ b/flight/modules/Stabilization/altitudeloop.c
@@ -163,11 +163,13 @@ static void altitudeHoldTask(void)
     dT = PIOS_DELTATIME_GetAverageSeconds(&timeval);
     switch (thrustMode) {
     case ALTITUDEHOLD:
+    {
         // altitude control loop
         // No scaling.
-        pid_scaler scaler = { .p = 1.0f, .i = 1.0f, .d = 1.0f };
+        const pid_scaler scaler = { .p = 1.0f, .i = 1.0f, .d = 1.0f };
         altitudeHoldStatus.VelocityDesired = pid_apply_setpoint(&pid0, &scaler, thrustSetpoint, positionStateDown, dT);
-        break;
+    }
+    break;
     case ALTITUDEVARIO:
         altitudeHoldStatus.VelocityDesired = thrustSetpoint;
         break;
@@ -183,12 +185,13 @@ static void altitudeHoldTask(void)
         thrustDemand = thrustSetpoint;
         break;
     default:
+    {
         // velocity control loop
         // No scaling.
-        pid_scaler scaler = { .p = 1.0f, .i = 1.0f, .d = 1.0f };
+        const pid_scaler scaler = { .p = 1.0f, .i = 1.0f, .d = 1.0f };
         thrustDemand = startThrust - pid_apply_setpoint(&pid1, &scaler, altitudeHoldStatus.VelocityDesired, velocityStateDown, dT);
-
-        break;
+    }
+    break;
     }
 }