diff --git a/scripts/acov b/scripts/acov
index d6095a881..ef7c86a95 100755
--- a/scripts/acov
+++ b/scripts/acov
@@ -30,7 +30,7 @@
 # it in your browser).
 #
 
-which lcov
+which lcov >/dev/null 2>/dev/null
 if [ $? -ne 0 ]; then
   echo 'lcov not found: running `sudo apt-get install lcov`'
   sudo apt-get install lcov