diff --git a/eng/build.sh b/eng/build.sh
index 52d6286f8ff744..590f9fa3d26eb8 100755
--- a/eng/build.sh
+++ b/eng/build.sh
@@ -278,6 +278,8 @@ while [[ $# -gt 0 ]]; do
           os="linux" ;;
         freebsd)
           os="freebsd" ;;
+        openbsd)
+          os="openbsd" ;;
         osx)
           os="osx" ;;
         maccatalyst)