diff --git a/js/ctypes/libffi/msvcc.sh b/js/ctypes/libffi/msvcc.sh
index d7a599b7b8e5..5338e690aad0 100755
--- a/js/ctypes/libffi/msvcc.sh
+++ b/js/ctypes/libffi/msvcc.sh
@@ -44,7 +44,7 @@
 
 # Disable specific warnings, and enable warnings-as-errors so we catch any
 # mistranslated args.
-nowarn="-wd4127 -wd4820 -wd4706 -wd4100 -wd4255 -wd4668 -wd4053 -wd4324 -wd4267 -wd4054"
+nowarn="-wd4127 -wd4820 -wd4706 -wd4100 -wd4255 -wd4668 -wd4053 -wd4324 -wd4267 -wd4054 -wd4702"
 args="-nologo -W3 -WX $nowarn"
 md=-MD
 cl="cl"