diff --git a/.cirrus.yml b/.cirrus.yml
index 52dd117955..cd008f6d2e 100644
--- a/.cirrus.yml
+++ b/.cirrus.yml
@@ -28,8 +28,8 @@ task:
     wxPROC_COUNT=`./build/tools/proc_count.sh`
     # ARM systems have 64 CPUs but run out of memory and crash when using that
     # many jobs, so limit them to something reasonable.
-    if [ $wxPROC_COUNT -gt 16 ]; then
-      wxPROC_COUNT=16
+    if [ $wxPROC_COUNT -gt 12 ]; then
+      wxPROC_COUNT=12
     fi
 
     echo wxBUILD_ARGS=-j$wxPROC_COUNT >> $CIRRUS_ENV