diff --git a/wpilibc/src/main/native/include/frc/ADXL345_I2C.h b/wpilibc/src/main/native/include/frc/ADXL345_I2C.h
index 2fe0da4a35..e34a7bc888 100644
--- a/wpilibc/src/main/native/include/frc/ADXL345_I2C.h
+++ b/wpilibc/src/main/native/include/frc/ADXL345_I2C.h
@@ -100,7 +100,7 @@ class ADXL345_I2C : public nt::NTSendable,
 
   void InitSendable(nt::NTSendableBuilder& builder) override;
 
- protected:
+ private:
   I2C m_i2c;
 
   hal::SimDevice m_simDevice;
diff --git a/wpilibc/src/main/native/include/frc/ADXL345_SPI.h b/wpilibc/src/main/native/include/frc/ADXL345_SPI.h
index 3f2d8aebab..c99e3baa00 100644
--- a/wpilibc/src/main/native/include/frc/ADXL345_SPI.h
+++ b/wpilibc/src/main/native/include/frc/ADXL345_SPI.h
@@ -93,7 +93,7 @@ class ADXL345_SPI : public nt::NTSendable,
 
   void InitSendable(nt::NTSendableBuilder& builder) override;
 
- protected:
+ private:
   SPI m_spi;
 
   hal::SimDevice m_simDevice;
diff --git a/wpilibc/src/main/native/include/frc/AnalogGyro.h b/wpilibc/src/main/native/include/frc/AnalogGyro.h
index 0c472fbf7f..3913b40488 100644
--- a/wpilibc/src/main/native/include/frc/AnalogGyro.h
+++ b/wpilibc/src/main/native/include/frc/AnalogGyro.h
@@ -218,10 +218,8 @@ class AnalogGyro : public wpi::Sendable,
 
   void InitSendable(wpi::SendableBuilder& builder) override;
 
- protected:
-  std::shared_ptr<AnalogInput> m_analog;
-
  private:
+  std::shared_ptr<AnalogInput> m_analog;
   hal::Handle<HAL_GyroHandle> m_gyroHandle;
 };
 
diff --git a/wpilibj/src/main/java/edu/wpi/first/wpilibj/ADXL345_I2C.java b/wpilibj/src/main/java/edu/wpi/first/wpilibj/ADXL345_I2C.java
index e96151bd76..e1819c0e27 100644
--- a/wpilibj/src/main/java/edu/wpi/first/wpilibj/ADXL345_I2C.java
+++ b/wpilibj/src/main/java/edu/wpi/first/wpilibj/ADXL345_I2C.java
@@ -70,13 +70,13 @@ public class ADXL345_I2C implements NTSendable, AutoCloseable {
     public double ZAxis;
   }
 
-  protected I2C m_i2c;
+  private I2C m_i2c;
 
-  protected SimDevice m_simDevice;
-  protected SimEnum m_simRange;
-  protected SimDouble m_simX;
-  protected SimDouble m_simY;
-  protected SimDouble m_simZ;
+  private SimDevice m_simDevice;
+  private SimEnum m_simRange;
+  private SimDouble m_simX;
+  private SimDouble m_simY;
+  private SimDouble m_simZ;
 
   /**
    * Constructs the ADXL345 Accelerometer with I2C address 0x1D.
diff --git a/wpilibj/src/main/java/edu/wpi/first/wpilibj/ADXL345_SPI.java b/wpilibj/src/main/java/edu/wpi/first/wpilibj/ADXL345_SPI.java
index b98b917f43..941ce9d0fc 100644
--- a/wpilibj/src/main/java/edu/wpi/first/wpilibj/ADXL345_SPI.java
+++ b/wpilibj/src/main/java/edu/wpi/first/wpilibj/ADXL345_SPI.java
@@ -67,13 +67,13 @@ public class ADXL345_SPI implements NTSendable, AutoCloseable {
     public double ZAxis;
   }
 
-  protected SPI m_spi;
+  private SPI m_spi;
 
-  protected SimDevice m_simDevice;
-  protected SimEnum m_simRange;
-  protected SimDouble m_simX;
-  protected SimDouble m_simY;
-  protected SimDouble m_simZ;
+  private SimDevice m_simDevice;
+  private SimEnum m_simRange;
+  private SimDouble m_simX;
+  private SimDouble m_simY;
+  private SimDouble m_simZ;
 
   /**
    * Constructor.
diff --git a/wpilibj/src/main/java/edu/wpi/first/wpilibj/AnalogGyro.java b/wpilibj/src/main/java/edu/wpi/first/wpilibj/AnalogGyro.java
index 198283e34f..29a17bbed0 100644
--- a/wpilibj/src/main/java/edu/wpi/first/wpilibj/AnalogGyro.java
+++ b/wpilibj/src/main/java/edu/wpi/first/wpilibj/AnalogGyro.java
@@ -25,7 +25,7 @@ import edu.wpi.first.util.sendable.SendableRegistry;
  */
 public class AnalogGyro implements Sendable, AutoCloseable {
   private static final double kDefaultVoltsPerDegreePerSecond = 0.007;
-  protected AnalogInput m_analog;
+  private AnalogInput m_analog;
   private boolean m_channelAllocated;
 
   private int m_gyroHandle;