diff --git a/include/time.h b/include/time.h
index 96463cc89..678231685 100644
--- a/include/time.h
+++ b/include/time.h
@@ -93,6 +93,9 @@ unsigned _clocks_per_sec (void);
 #    define CLK_TCK	  	60	/* POSIX */
 #    define CLOCKS_PER_SEC	60     	/* ANSI */
 #  endif
+#elif defined(__NES__)
+#  define CLK_TCK    	       	50 	/* POSIX */
+#  define CLOCKS_PER_SEC	50	/* ANSI */
 #endif