diff --git a/lib/functions.zsh b/lib/functions.zsh
index 1623df2bd..bbdbea5cb 100644
--- a/lib/functions.zsh
+++ b/lib/functions.zsh
@@ -23,7 +23,7 @@ function open_command() {
     darwin*)  open_cmd="open" ;;
     cygwin*)  open_cmd="cygstart" ;;
     linux*)   open_cmd="xdg-open" ;;
-    msys*)    open_cmd="start" ;;
+    msys*)    open_cmd="start \"\"" ;;
     *)        echo "Platform $OSTYPE not supported"
               return 1
               ;;
@@ -33,7 +33,7 @@ function open_command() {
   if [[ "$OSTYPE" == darwin* ]]; then
     $open_cmd "$@" &>/dev/null
   else
-    nohup $open_cmd "$@" &>/dev/null
+    nohup ${(z)open_cmd} "$@" &>/dev/null
   fi
 }