diff --git a/tools/build-and-install b/tools/build-and-install
index bc7c265ea9f2dbcb45a6d435439cb3b1aed71eb8..adcf817d5302a63219a300af80da8fdc72368c7c 100755
--- a/tools/build-and-install
+++ b/tools/build-and-install
@@ -32,7 +32,7 @@ sed_fix ()
 	)
 }
 
-mkdir_if_needed () { if test ! -d "$1"; then mkdir "$1"; fi }
+mkdir_if_needed () { if test ! -d "$1"; then mkdir "$1"; fi; }
 
 usage ()
 {