diff --git a/lib_ppc/time.c b/lib_ppc/time.c
index 51e8e840..2649d5f 100644
--- a/lib_ppc/time.c
+++ b/lib_ppc/time.c
@@ -23,6 +23,9 @@
 
 #include <common.h>
 
+#ifndef CONFIG_WD_PERIOD
+# define CONFIG_WD_PERIOD	(10 * 1000 * 1000)	/* 10 seconds default*/
+#endif
 
 /* ------------------------------------------------------------------------- */
 
@@ -53,9 +56,14 @@
  */
 void udelay(unsigned long usec)
 {
-	ulong ticks = usec2ticks (usec);
+	ulong ticks, kv;
 
-	wait_ticks (ticks);
+	do {
+		kv = usec > CONFIG_WD_PERIOD ? CONFIG_WD_PERIOD : usec;
+		ticks = usec2ticks (kv);
+		wait_ticks (ticks);
+		usec -= kv;
+	} while(usec);
 }
 
 /* ------------------------------------------------------------------------- */