diff --git a/jupyter_c_kernel/kernel.py b/jupyter_c_kernel/kernel.py
index 68eda6a..99243fc 100644
--- a/jupyter_c_kernel/kernel.py
+++ b/jupyter_c_kernel/kernel.py
@@ -74,7 +74,6 @@ class RealTimeSubprocess(subprocess.Popen):
                 readLine = self._read_from_stdin()
                 # need to add newline since it is not captured by frontend
                 readLine += "\n"
-                os.write(1, readLine.encode());
                 self.stdin.write(readLine.encode())
             else:
                 self._write_to_stdout(contents)
diff --git a/jupyter_c_kernel/resources/stdio_wrap.h b/jupyter_c_kernel/resources/stdio_wrap.h
index 9c431cc..e9bdc59 100644
--- a/jupyter_c_kernel/resources/stdio_wrap.h
+++ b/jupyter_c_kernel/resources/stdio_wrap.h
@@ -24,7 +24,6 @@ int scanf_wrap(const char *format, ...) {
   /* unget chars in buffer */
   int doRequest = 1;
   long index = strlen(inputBuff) - 1;
-  // printf("Start index: %ld\n", index);
   for(; index >= 0; --index) {
     ungetc(inputBuff[index], stdin);
     /* if there already is a newline in buffer