diff --git a/startup.script_common b/startup.script_common
index 857fd2f..5a39ba5 100644
--- a/startup.script_common
+++ b/startup.script_common
@@ -44,8 +44,10 @@ putenv("EPICS_TS_NTP_INET=129.129.190.1")
 
 # Release memory above 32 MB
 # Code loaded after this must be compiled with -mlongcall
-memAddToPool (sysMemTop(),sysPhysMemTop()-sysMemTop())
-EXTENDED_MEMORY=0
+# at the moment snp24 does not work with this
+#memAddToPool (sysMemTop(),sysPhysMemTop()-sysMemTop())
+#EXTENDED_MEMORY=0
+EXTENDED_MEMORY=sysPhysMemTop()-sysMemTop()
 
 #Load EPICS version dependent script
 sprintf (STRINGBUFFER, "%s/iocBoot/startup/EPICS_%s", INSTBASE, EPICS)