diff --git a/build/docker/scripts/ubsan.sh b/build/docker/scripts/ubsan.sh
index 6db10f3..d39cc83 100755
--- a/build/docker/scripts/ubsan.sh
+++ b/build/docker/scripts/ubsan.sh
@@ -15,7 +15,7 @@
 # undefined casting, aka "vptr".
 #
 # TODO: fix undefined vptr behavior and turn this option back on.
-export CFLAGS="-fsanitize=undefined -fno-sanitize-recover=undefined -fno-sanitize=vptr"
+export CFLAGS="-fsanitize=undefined -fno-sanitize-recover=undefined"
 # Builds without optimization and with debugging symbols for making crash reports more
 # readable.
 export CFLAGS="${CFLAGS} -O0 -ggdb3"