diff --git a/package/gluon-core/luasrc/usr/lib/lua/gluon/util.lua b/package/gluon-core/luasrc/usr/lib/lua/gluon/util.lua
index c6328b8b..b3144d76 100644
--- a/package/gluon-core/luasrc/usr/lib/lua/gluon/util.lua
+++ b/package/gluon-core/luasrc/usr/lib/lua/gluon/util.lua
@@ -221,7 +221,7 @@ function M.popen3(policies, path, ...)
 
 	local pid = posix_unistd.fork()
 
-	if pid < 0 then
+	if pid == nil then
 		return nil
 	elseif pid == 0 then
 		local null=-1;