diff --git a/src/sensors/mpu9250sensor.cpp b/src/sensors/mpu9250sensor.cpp
index 5742188..49b38e0 100644
--- a/src/sensors/mpu9250sensor.cpp
+++ b/src/sensors/mpu9250sensor.cpp
@@ -171,9 +171,9 @@ void MPU9250Sensor::motionLoop() {
     last = now;
     getMPUScaled();
     
-    #if defined(_MAHONY_H_))
+    #if defined(_MAHONY_H_)
     mahonyQuaternionUpdate(q, Axyz[0], Axyz[1], Axyz[2], Gxyz[0], Gxyz[1], Gxyz[2], Mxyz[0], Mxyz[1], Mxyz[2], deltat * 1.0e-6);
-    #elif defined(_MADGWICK_H_))
+    #elif defined(_MADGWICK_H_)
     madgwickQuaternionUpdate(q, Axyz[0], Axyz[1], Axyz[2], Gxyz[0], Gxyz[1], Gxyz[2], Mxyz[0], Mxyz[1], Mxyz[2], deltat * 1.0e-6);
     #endif
     quaternion.set(-q[2], q[1], q[3], q[0]);