diff --git a/win32/win32.c b/win32/win32.c
index a2daba2fa1..2bce73ab9f 100644
--- a/win32/win32.c
+++ b/win32/win32.c
@@ -4761,6 +4761,7 @@ gettimeofday(struct timeval *tv, struct timezone *tz)
     return 0;
 }
 
+#ifndef HAVE_CLOCK_GETTIME
 /* License: Ruby's */
 int
 clock_gettime(clockid_t clock_id, struct timespec *sp)
@@ -4800,7 +4801,9 @@ clock_gettime(clockid_t clock_id, struct timespec *sp)
         return -1;
     }
 }
+#endif
 
+#ifndef HAVE_CLOCK_GETRES
 /* License: Ruby's */
 int
 clock_getres(clockid_t clock_id, struct timespec *sp)
@@ -4828,6 +4831,7 @@ clock_getres(clockid_t clock_id, struct timespec *sp)
         return -1;
     }
 }
+#endif
 
 /* License: Ruby's */
 static char *