diff --git a/examples/platforms/posix/alarm.c b/examples/platforms/posix/alarm.c
index ef6d61f86..808b2e654 100644
--- a/examples/platforms/posix/alarm.c
+++ b/examples/platforms/posix/alarm.c
@@ -36,6 +36,10 @@
 
 #include "utils/code_utils.h"
 
+#ifndef __linux__
+#define __linux__ 0
+#endif
+
 // linux microsecond timer
 #if __linux__
 
diff --git a/examples/platforms/posix/openthread-core-posix-config.h b/examples/platforms/posix/openthread-core-posix-config.h
index 627d76cbe..465c69b22 100644
--- a/examples/platforms/posix/openthread-core-posix-config.h
+++ b/examples/platforms/posix/openthread-core-posix-config.h
@@ -35,6 +35,10 @@
 #ifndef OPENTHREAD_CORE_POSIX_CONFIG_H_
 #define OPENTHREAD_CORE_POSIX_CONFIG_H_
 
+#ifndef OPENTHREAD_RADIO
+#define OPENTHREAD_RADIO 0
+#endif
+
 /**
  * @def OPENTHREAD_CONFIG_PLATFORM_INFO
  *