diff --git a/lib/lib_audio/ESP8266Audio/src/libwebm/mkvmuxer/mkvmuxer.cc b/lib/lib_audio/ESP8266Audio/src/libwebm/mkvmuxer/mkvmuxer.cc
index ab20963b2..f59c4584d 100644
--- a/lib/lib_audio/ESP8266Audio/src/libwebm/mkvmuxer/mkvmuxer.cc
+++ b/lib/lib_audio/ESP8266Audio/src/libwebm/mkvmuxer/mkvmuxer.cc
@@ -7,6 +7,7 @@
 // be found in the AUTHORS file in the root of the source tree.
 
 #include "mkvmuxer.h"
+#ifdef ESP32
 
 #include <stdint.h>
 
@@ -4202,3 +4203,5 @@ bool Segment::DocTypeIsWebm() const {
 }
 
 }  // namespace mkvmuxer
+
+#endif //ESP32
\ No newline at end of file
diff --git a/lib/lib_audio/ESP8266Audio/src/libwebm/mkvmuxer/mkvmuxer.h b/lib/lib_audio/ESP8266Audio/src/libwebm/mkvmuxer/mkvmuxer.h
index 78945e42e..a7d0984df 100644
--- a/lib/lib_audio/ESP8266Audio/src/libwebm/mkvmuxer/mkvmuxer.h
+++ b/lib/lib_audio/ESP8266Audio/src/libwebm/mkvmuxer/mkvmuxer.h
@@ -8,6 +8,7 @@
 
 #ifndef MKVMUXER_MKVMUXER_H_
 #define MKVMUXER_MKVMUXER_H_
+#ifdef ESP32
 
 #include <stdint.h>
 
@@ -1921,4 +1922,5 @@ class Segment {
 
 }  // namespace mkvmuxer
 
+#endif // ESP32
 #endif  // MKVMUXER_MKVMUXER_H_
diff --git a/lib/lib_audio/ESP8266Audio/src/libwebm/mkvmuxer/mkvmuxerutil.cc b/lib/lib_audio/ESP8266Audio/src/libwebm/mkvmuxer/mkvmuxerutil.cc
index 81d532774..f1941e258 100644
--- a/lib/lib_audio/ESP8266Audio/src/libwebm/mkvmuxer/mkvmuxerutil.cc
+++ b/lib/lib_audio/ESP8266Audio/src/libwebm/mkvmuxer/mkvmuxerutil.cc
@@ -7,6 +7,7 @@
 // be found in the AUTHORS file in the root of the source tree.
 
 #include "mkvmuxerutil.h"
+#ifdef ESP32
 
 #ifdef __ANDROID__
 #include <fcntl.h>
@@ -735,3 +736,4 @@ bool IsPrimariesValueValid(uint64_t value) {
 }
 
 }  // namespace mkvmuxer
+#endif // ESP32
\ No newline at end of file
diff --git a/lib/lib_audio/ESP8266Audio/src/libwebm/mkvmuxer/mkvmuxerutil.h b/lib/lib_audio/ESP8266Audio/src/libwebm/mkvmuxer/mkvmuxerutil.h
index 776bc5cb2..461b16ac0 100644
--- a/lib/lib_audio/ESP8266Audio/src/libwebm/mkvmuxer/mkvmuxerutil.h
+++ b/lib/lib_audio/ESP8266Audio/src/libwebm/mkvmuxer/mkvmuxerutil.h
@@ -7,6 +7,7 @@
 // be found in the AUTHORS file in the root of the source tree.
 #ifndef MKVMUXER_MKVMUXERUTIL_H_
 #define MKVMUXER_MKVMUXERUTIL_H_
+#ifdef ESP32
 
 #include <stdint.h>
 
@@ -112,4 +113,5 @@ bool IsPrimariesValueValid(uint64_t value);
 
 }  // namespace mkvmuxer
 
+#endif // ESP32
 #endif  // MKVMUXER_MKVMUXERUTIL_H_
diff --git a/lib/lib_audio/ESP8266Audio/src/libwebm/mkvmuxer/mkvwriter.cc b/lib/lib_audio/ESP8266Audio/src/libwebm/mkvmuxer/mkvwriter.cc
index 18a13bd8e..47b62f034 100644
--- a/lib/lib_audio/ESP8266Audio/src/libwebm/mkvmuxer/mkvwriter.cc
+++ b/lib/lib_audio/ESP8266Audio/src/libwebm/mkvmuxer/mkvwriter.cc
@@ -7,6 +7,7 @@
 // be found in the AUTHORS file in the root of the source tree.
 
 #include "mkvwriter.h"
+#ifdef ESP32
 
 #include <sys/types.h>
 
@@ -97,3 +98,4 @@ bool MkvWriter::Seekable() const {
 void MkvWriter::ElementStartNotify(uint64, int64) {}
 
 }  // namespace mkvmuxer
+#endif // ESP32
\ No newline at end of file
diff --git a/lib/lib_audio/ESP8266Audio/src/libwebm/mkvmuxer/mkvwriter.h b/lib/lib_audio/ESP8266Audio/src/libwebm/mkvmuxer/mkvwriter.h
index 92ff937b8..8ea2e24f3 100644
--- a/lib/lib_audio/ESP8266Audio/src/libwebm/mkvmuxer/mkvwriter.h
+++ b/lib/lib_audio/ESP8266Audio/src/libwebm/mkvmuxer/mkvwriter.h
@@ -9,9 +9,10 @@
 #ifndef MKVMUXER_MKVWRITER_H_
 #define MKVMUXER_MKVWRITER_H_
 
+#ifdef ESP32
 #include <stdio.h>
-#include "Fs.h"
 
+#include "Fs.h"
 #include "mkvmuxer.h"
 #include "mkvmuxertypes.h"
 
@@ -55,4 +56,5 @@ class MkvWriter : public IMkvWriter {
 
 }  // namespace mkvmuxer
 
+#endif // ESP32
 #endif  // MKVMUXER_MKVWRITER_H_