diff --git a/platformio.ini b/platformio.ini
index 499abe5cd..a4a5b260c 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -37,7 +37,7 @@ build_flags = ${common.general_flags} ${common.build_flags_4m1m}
 
 [env]
 framework = arduino
-platform = espressif8266
+platform = espressif8266@2.2.3
 ;platform = https://github.com/platformio/platform-espressif8266#develop
 ;platform = https://github.com/platformio/platform-espressif8266#feature/stage
 lib_deps =
diff --git a/src/TelnetSpy.cpp b/src/TelnetSpy.cpp
index 07b625c7d..dfda8af91 100644
--- a/src/TelnetSpy.cpp
+++ b/src/TelnetSpy.cpp
@@ -24,16 +24,6 @@ extern "C" {
 
 static TelnetSpy * actualObject = NULL;
 
-static void TelnetSpy_putc(char c) {
-    if (actualObject) {
-        actualObject->write(c);
-    }
-}
-
-static void TelnetSpy_ignore_putc(char c) {
-    ;
-}
-
 TelnetSpy::TelnetSpy() {
     port               = TELNETSPY_PORT;
     telnetServer       = NULL;
@@ -437,19 +427,8 @@ void TelnetSpy::setDebugOutput(bool en) {
 
     if (debugOutput) {
         actualObject = this;
-
-#ifdef ESP8266
-        os_install_putc1((void *)TelnetSpy_putc); // Set system printing (os_printf) to TelnetSpy
-        system_set_os_print(true);
-#endif
-
     } else {
         if (actualObject == this) {
-#ifdef ESP8266
-            system_set_os_print(false);
-            os_install_putc1((void *)TelnetSpy_ignore_putc); // Ignore system printing
-#endif
-
             actualObject = NULL;
         }
     }
diff --git a/src/TelnetSpy.h b/src/TelnetSpy.h
index 2b57d0490..a7884adeb 100644
--- a/src/TelnetSpy.h
+++ b/src/TelnetSpy.h
@@ -157,7 +157,7 @@
 #define TELNETSPY_MAX_BLOCK_SIZE 512
 #define TELNETSPY_PING_TIME 1500
 #define TELNETSPY_PORT 23
-#define TELNETSPY_CAPTURE_OS_PRINT true
+#define TELNETSPY_CAPTURE_OS_PRINT false
 #define TELNETSPY_WELCOME_MSG "Connection established via Telnet.\n"
 #define TELNETSPY_REJECT_MSG "Telnet: Only one connection possible.\n"