diff --git a/tools/build-openssl.sh b/tools/build-openssl.sh
index 3be492d..075d82f 100755
--- a/tools/build-openssl.sh
+++ b/tools/build-openssl.sh
@@ -18,7 +18,7 @@ fi
 if [ -d $TMPROOT/openssl/ios-openssl ] ; then
     try pushd .
     cd $TMPROOT/openssl/ios-openssl
-    build.sh
+    sh build.sh
     try popd
 fi