diff --git a/boards/qemu-i386/include/cpu_conf.h b/boards/qemu-i386/include/cpu_conf.h
index 2a45a5ad2b17380c7577d38a67f5c07b912b5933..8c95ec3e6c6355a70f91a22b3a4dd7e875420ee8 100644
--- a/boards/qemu-i386/include/cpu_conf.h
+++ b/boards/qemu-i386/include/cpu_conf.h
@@ -31,8 +31,6 @@ extern "C" {
 #define THREAD_EXTRA_STACKSIZE_PRINTF_FLOAT      (8192)
 #define THREAD_STACKSIZE_MINIMUM                 (8192)
 
-#define UART0_BUFSIZE                      (16)
-
 #define F_CPU (1000000) /* This value is unused in x86 */
 
 #ifdef __cplusplus