diff --git a/support/aphlict/client/build_aphlict_client.sh b/support/aphlict/client/build_aphlict_client.sh
index a9a324052a..7c9eb01bc6 100755
--- a/support/aphlict/client/build_aphlict_client.sh
+++ b/support/aphlict/client/build_aphlict_client.sh
@@ -12,6 +12,7 @@ set -e
 
 $MXMLC \
   -output=$ROOT/webroot/rsrc/swf/aphlict.swf \
+  -strict=true \
   -warnings=true \
   -source-path=$ROOT/externals/vegas/src \
   -static-link-runtime-shared-libraries=true \