diff --git a/build_gcc.sh b/build_gcc.sh
index 1acaba8f4..e7cfd5782 100755
--- a/build_gcc.sh
+++ b/build_gcc.sh
@@ -103,6 +103,7 @@ fi
 
 
 mkdir -p build
+./contrib/download_prerequisites
 pushd build &>/dev/null
 
 if [[ $PLATFORM == *BSD ]]; then