diff --git a/setup.sh b/setup.sh
index ecda8902..380f640a 100755
--- a/setup.sh
+++ b/setup.sh
@@ -24,7 +24,7 @@ if [[ "$unamestr" == 'Darwin' ]]; then
     minor=$(echo "$current_macos_version" | cut -d'.' -f2)
     is_installed=$(pkgutil --pkgs=com.apple.pkg.macOS_SDK_headers_for_macOS_${current_macos_version})
     if [ -z "$is_installed" ]; then
-        if [ "$major" -ge "10" ] && [ "$minor" -ge "14" ]; then
+        if [ "$major" -ge "10" ] && [ "$minor" -lt "15" ]; then
             echo 'Please install command-line tools and macOS headers.'
             echo 'xcode-select --install'
             echo "sudo installer -pkg /Library/Developer/CommandLineTools/Packages/macOS_SDK_headers_for_macOS_${current_macos_version}.pkg -target /"