diff --git a/script/configure.sh b/script/configure.sh
index fc4c56e0..9188b9e7 100755
--- a/script/configure.sh
+++ b/script/configure.sh
@@ -5,7 +5,7 @@ set -e
 git submodule update --init
 externals/gyp/gyp tree_sitter.gyp --depth . --format=make $@
 
-if [ $1 == "-h" ]; then
+if [ "$1" == "-h" ]; then
   cat <<-HELP
 
 Variables: