diff --git a/include/posix/posix_types.h b/include/posix/posix_types.h
index 15b0ba8d2d4..93d0b10aa79 100644
--- a/include/posix/posix_types.h
+++ b/include/posix/posix_types.h
@@ -17,13 +17,19 @@
 extern "C" {
 #endif
 
+#ifndef __useconds_t_defined
 typedef unsigned long useconds_t;
+#endif
 
 /* time related attributes */
 #ifndef CONFIG_NEWLIB_LIBC
+#ifndef __clockid_t_defined
 typedef u32_t clockid_t;
+#endif
 #endif /*CONFIG_NEWLIB_LIBC */
+#ifndef __timer_t_defined
 typedef unsigned long timer_t;
+#endif
 
 #ifdef CONFIG_PTHREAD_IPC
 /* Thread attributes */
diff --git a/include/posix/time.h b/include/posix/time.h
index ce0648ed68e..65ca722e9a3 100644
--- a/include/posix/time.h
+++ b/include/posix/time.h
@@ -43,7 +43,12 @@ struct itimerspec {
 
 #else /* CONFIG_NEWLIB_LIBC */
 /* Not Newlib */
-#include <sys/timespec.h>
+# ifdef CONFIG_ARCH_POSIX
+#  include <bits/types/struct_timespec.h>
+#  include <bits/types/struct_itimerspec.h>
+# else
+#  include <sys/timespec.h>
+# endif
 #endif /* CONFIG_NEWLIB_LIBC */
 
 #include <kernel.h>