diff --git a/ecllibrary/std/system/Debug.ecl b/ecllibrary/std/system/Debug.ecl
index 663cbe5954c..a7f8adbea51 100644
--- a/ecllibrary/std/system/Debug.ecl
+++ b/ecllibrary/std/system/Debug.ecl
@@ -6,7 +6,7 @@
 
 rtl := SERVICE
  unsigned4 msTick() :       eclrtl,library='eclrtl',entrypoint='rtlTick';
- unsigned4 sleep(unsigned4 _delay) : eclrtl,action,library='eclrtl',entrypoint='rtlSleep';
+ unsigned4 sleep(unsigned4 _delay) : eclrtl,action,library='eclrtl',entrypoint='rtlSleep',time;
  printStackReport(integer startIP) : cpp,action,library='jlib';
 END;