diff --git a/startup.script_common b/startup.script_common
index 1c15e57..857fd2f 100644
--- a/startup.script_common
+++ b/startup.script_common
@@ -44,8 +44,7 @@ putenv("EPICS_TS_NTP_INET=129.129.190.1")
 
 # Release memory above 32 MB
 # Code loaded after this must be compiled with -mlongcall
-EXTENDED_MEMORY=sysPhysMemTop()-sysMemTop()
-memAddToPool (sysMemTop(),EXTENDED_MEMORY)
+memAddToPool (sysMemTop(),sysPhysMemTop()-sysMemTop())
 EXTENDED_MEMORY=0
 
 #Load EPICS version dependent script