diff --git a/include/ylt/easylog/record.hpp b/include/ylt/easylog/record.hpp
index 8c8eee617..42d595a62 100644
--- a/include/ylt/easylog/record.hpp
+++ b/include/ylt/easylog/record.hpp
@@ -21,12 +21,16 @@
 
 #include "ylt/util/time_util.h"
 #ifdef __linux__
-#include <sys/syscall.h>
 #include <unistd.h>
 #endif
 #if __has_include(<memory_resource>)
 #include <memory_resource>
 #endif
+#if defined(__linux__) || defined(__FreeBSD__)
+#include <sys/syscall.h>
+#elif defined(__rtems__)
+#include <rtems.h>
+#endif
 #include <sstream>
 #include <string>
 #include <string_view>