diff --git a/src/kaleidoscope/device/virtual/HID.cpp b/src/kaleidoscope/device/virtual/HID.cpp
index cf751f3f..c7faea2a 100644
--- a/src/kaleidoscope/device/virtual/HID.cpp
+++ b/src/kaleidoscope/device/virtual/HID.cpp
@@ -16,6 +16,8 @@
    SOFTWARE.
  */
 
+#ifdef KALEIDOSCOPE_VIRTUAL_BUILD
+
 // This is a modified version of the original HID.cpp from
 // library KeyboardioHID. It replaces all hardware related stuff
 // with stub implementations.
@@ -92,3 +94,5 @@ int HID_::begin(void) {
 }
 
 #endif /* if defined(USBCON) */
+
+#endif // #ifdef KALEIDOSCOPE_VIRTUAL_BUILD
diff --git a/src/kaleidoscope/device/virtual/Logging.cpp b/src/kaleidoscope/device/virtual/Logging.cpp
index 2acecbbc..d4a87839 100644
--- a/src/kaleidoscope/device/virtual/Logging.cpp
+++ b/src/kaleidoscope/device/virtual/Logging.cpp
@@ -14,6 +14,8 @@
  * this program. If not, see <http://www.gnu.org/licenses/>.
  */
 
+#ifdef KALEIDOSCOPE_VIRTUAL_BUILD
+
 #include "Logging.h"
 
 namespace kaleidoscope {
@@ -31,3 +33,5 @@ bool verboseOutputEnabled() {
 
 } // namespace logging
 } // namespace kaleidoscope
+
+#endif // #ifdef KALEIDOSCOPE_VIRTUAL_BUILD