diff --git a/script/mkconfig b/script/mkconfig
index b6d50a3276b1c063a8a7404e5ff894ca7d4431b1..f4e351755189c2df487370e895f0ded20304e182 100755
--- a/script/mkconfig
+++ b/script/mkconfig
@@ -12,6 +12,7 @@ bool "Call wakeup() on wakeup"
 
 config ostream
 bool "C++ ostream support in stdout"
+depends on arch_esp8266 || arch_msp430fr5969lp || arch_msp430fr5994lp || arch_posix
 
 config i2c_freq
 int "I2C Frequency [Hz]"