diff --git a/ChangeLog b/ChangeLog
index 3115164..7f3dbce 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -97,6 +97,9 @@ known to work (currently only Linux) try to run this test.
 descriptors instead of redirecting stderr to stdout. This worked on Linux, but 
 it was reported not to on other systems, causing the tests to fail.
 
+25. In the RunTest script, make the test for stack setting use the same value
+for the stack as it needs for -bigstack.
+
 
 Version 10.32 10-September-2018
 -------------------------------
diff --git a/RunTest b/RunTest
index 39f04d4..6715d15 100755
--- a/RunTest
+++ b/RunTest
@@ -319,7 +319,7 @@ fi
 # If it is possible to set the system stack size and -bigstack was given,
 # set up a large stack.
 
-$sim ./pcre2test -S 1 /dev/null /dev/null
+$sim ./pcre2test -S 64 /dev/null /dev/null
 if [ $? -eq 0 -a "$bigstack" != "" ] ; then
   setstack="-S 64"
 else