diff --git a/java/lib/CameraServerJNI.cpp b/java/lib/CameraServerJNI.cpp
index f8bf66bf22..1641cc07df 100644
--- a/java/lib/CameraServerJNI.cpp
+++ b/java/lib/CameraServerJNI.cpp
@@ -177,6 +177,7 @@ static inline bool CheckStatus(JNIEnv *env, CS_Status status) {
   return status == CS_OK;
 }
 
+#ifdef __linux__
 static jobject MakeJObject(JNIEnv *env, const cs::UsbCameraInfo &info) {
   static jmethodID constructor = env->GetMethodID(
       usbCameraInfoCls, "<init>", "(ILjava/lang/String;Ljava/lang/String;)V");
@@ -185,6 +186,7 @@ static jobject MakeJObject(JNIEnv *env, const cs::UsbCameraInfo &info) {
   return env->NewObject(usbCameraInfoCls, constructor,
                         static_cast<jint>(info.dev), path.obj(), name.obj());
 }
+#endif
 
 static jobject MakeJObject(JNIEnv *env, const cs::VideoMode &videoMode) {
   static jmethodID constructor =
@@ -386,7 +388,7 @@ JNIEXPORT jobjectArray JNICALL Java_edu_wpi_cscore_CameraServerJNI_getEnumProper
 JNIEXPORT jint JNICALL Java_edu_wpi_cscore_CameraServerJNI_createUsbCameraDev
   (JNIEnv *env, jclass, jstring name, jint dev)
 {
-#ifdef _WIN32
+#ifndef __linux__
   unsupportedEx.Throw(env, "USB is not supported yet");
   return 0;
 #else
@@ -409,7 +411,7 @@ JNIEXPORT jint JNICALL Java_edu_wpi_cscore_CameraServerJNI_createUsbCameraDev
 JNIEXPORT jint JNICALL Java_edu_wpi_cscore_CameraServerJNI_createUsbCameraPath
   (JNIEnv *env, jclass, jstring name, jstring path)
 {
-#ifdef _WIN32
+#ifndef __linux__
   unsupportedEx.Throw(env, "USB is not supported yet");
   return 0;
 #else
@@ -870,7 +872,7 @@ JNIEXPORT void JNICALL Java_edu_wpi_cscore_CameraServerJNI_setCameraExposureManu
 JNIEXPORT jstring JNICALL Java_edu_wpi_cscore_CameraServerJNI_getUsbCameraPath
   (JNIEnv *env, jclass, jint source)
 {
-#ifdef _WIN32
+#ifndef __linux__
   unsupportedEx.Throw(env, "USB is not supported yet");
   return 0;
 #else
@@ -1379,7 +1381,7 @@ JNIEXPORT void JNICALL Java_edu_wpi_cscore_CameraServerJNI_removeListener
 JNIEXPORT jobjectArray JNICALL Java_edu_wpi_cscore_CameraServerJNI_enumerateUsbCameras
   (JNIEnv *env, jclass)
 {
-#ifdef _WIN32
+#ifndef __linux__
   unsupportedEx.Throw(env, "USB is not supported yet");
   return 0;
 #else
diff --git a/src/HttpCameraImpl.cpp b/src/HttpCameraImpl.cpp
index bcfe625418..494bc92abb 100644
--- a/src/HttpCameraImpl.cpp
+++ b/src/HttpCameraImpl.cpp
@@ -51,7 +51,7 @@ void HttpCameraImpl::Start() {
   m_settingsThread = std::thread(&HttpCameraImpl::SettingsThreadMain, this);
 }
 
-#ifndef _WIN32
+#ifdef __linux__
 static inline void DoFdSet(int fd, fd_set* set, int* nfds) {
   if (fd >= 0) {
     FD_SET(fd, set);
@@ -234,7 +234,7 @@ bool HttpCameraImpl::DeviceStreamFrame(wpi::raw_istream& is,
              wpi::Now());
     return true;
   }
- 
+
   // We know how big it is!  Just get a frame of the right size and read
   // the data directly into it.
   auto image = AllocImage(VideoMode::PixelFormat::kMJPEG, 0, 0, contentLength);
diff --git a/src/Image.h b/src/Image.h
index f20bdf830e..d8c7028705 100644
--- a/src/Image.h
+++ b/src/Image.h
@@ -26,7 +26,7 @@ class Image {
 
  public:
 
-#ifdef _WIN32
+#ifndef __linux__
   explicit Image(std::size_t capacity) {
     m_data.reserve(capacity);
   }
diff --git a/src/UsbCameraImpl.cpp b/src/UsbCameraImpl.cpp
index 0999b045cc..7a5bb483bf 100644
--- a/src/UsbCameraImpl.cpp
+++ b/src/UsbCameraImpl.cpp
@@ -42,14 +42,14 @@
 
 using namespace cs;
 
+#ifdef __linux__
+
 static constexpr char const* kPropWbAuto = "white_balance_temperature_auto";
 static constexpr char const* kPropWbValue = "white_balance_temperature";
 static constexpr char const* kPropExAuto = "exposure_auto";
 static constexpr char const* kPropExValue = "exposure_absolute";
 static constexpr char const* kPropBrValue = "brightness";
 
-#ifdef __linux__
-
 // Conversions v4l2_fract time per frame from/to frames per second (fps)
 static inline int FractToFPS(const struct v4l2_fract& timeperframe) {
   return (1.0 * timeperframe.denominator) / timeperframe.numerator;