diff --git a/target/h/logLib.h b/target/h/logLib.h
index cdad49c..a1e7c78 100644
--- a/target/h/logLib.h
+++ b/target/h/logLib.h
@@ -39,6 +39,9 @@ extern INT      API_LogMsg(CPCHAR       pcFormat,
                        (PVOID)d, (PVOID)e, (PVOID)f,    \
                        0, 0, 0, 0, FALSE);  \
         } while (0)
+#else
+#undef logFdAdd
+#undef logFdDelete
 #endif /* __SYLIXOS_KERNEL */
 
 extern STATUS   logFdAdd(int fd);
diff --git a/target/src/logLib.c b/target/src/logLib.c
index 26cbe55..65fc849 100644
--- a/target/src/logLib.c
+++ b/target/src/logLib.c
@@ -14,6 +14,9 @@
 #include <sys/select.h>
 #include "vxWorksCommon.h"
 
+#undef logFdAdd
+#undef logFdDelete
+
 /*
  * fd pool
  */