1 files changed, 1 insertions, 0 deletions
diff --git a/build-js.sh b/build-js.sh
index 037fed10e..1cd4c87ec 100755
--- a/build-js.sh
+++ b/build-js.sh
@@ -49,6 +49,7 @@ if [ "$1" == "-g" ]; then
   EMCC_ARGS="$EMCC_ARGS -O2" # need emcc js opts to be decently fast
   EMCC_ARGS="$EMCC_ARGS --llvm-opts 0 --llvm-lto 0"
   EMCC_ARGS="$EMCC_ARGS -profiling"
+  EMCC_ARGS="$EMCC_ARGS -s ASSERTIONS=1"
 else
   EMCC_ARGS="$EMCC_ARGS -Oz"
   EMCC_ARGS="$EMCC_ARGS --llvm-lto 1"