diff --git a/configure.ac b/configure.ac
index f5f5dc02..c21f1629 100644
--- a/configure.ac
+++ b/configure.ac
@@ -44,7 +44,7 @@ AS_CASE([$host_os],
 )
 AM_CONDITIONAL(TARGET_OS_OSX, test "x$os_osx" == xyes)
 
-AC_ARG_ENABLE([audio-callback], [AS_HELP_STRING([--enable-audio-callback], [enable callback-based audio I/O])], [], [enable_audio_callback=yes])
+AC_ARG_ENABLE([audio-callback], [AS_HELP_STRING([--enable-audio-callback], [enable callback-based audio I/O])], [], [enable_audio_callback=no])
 AM_CONDITIONAL(ENABLE_AUDIO_CALLBACK, test "x$enable_audio_callback" == xyes)
 
 AS_IF([test "x$os_osx" != xyes && test "x$enable_audio_callback" != xyes], [ # Linux
diff --git a/logging.h b/logging.h
index 2ddae181..37bf6de5 100644
--- a/logging.h
+++ b/logging.h
@@ -58,7 +58,7 @@ void tgvoip_log_file_write_header(FILE* file);
 
 #include <stdio.h>
 
-#define _TGVOIP_LOG_PRINT(verb, msg, ...) {printf("%c/tgvoip: " msg "\n", verb, ##__VA_ARGS__); tgvoip_log_file_printf(verb, msg, ##__VA_ARGS__);}
+#define _TGVOIP_LOG_PRINT(verb, msg, ...) {fprintf(stderr, "%c/tgvoip: " msg "\n", verb, ##__VA_ARGS__); tgvoip_log_file_printf(verb, msg, ##__VA_ARGS__);}
 
 #define LOGV(msg, ...) _TGVOIP_LOG_PRINT('V', msg, ##__VA_ARGS__)
 #define LOGD(msg, ...) _TGVOIP_LOG_PRINT('D', msg, ##__VA_ARGS__)