diff --git a/src/switch_core.c b/src/switch_core.c
index 973cfc8e13..4f1d73f002 100644
--- a/src/switch_core.c
+++ b/src/switch_core.c
@@ -605,7 +605,8 @@ static void load_mime_types(void)
 	mime_path = switch_mprintf("%s/%s", SWITCH_GLOBAL_dirs.conf_dir, cf);
 	assert(mime_path);
 
-	if (!(fd = open(mime_path, O_RDONLY))) {
+	fd = open(mime_path, O_RDONLY);
+	if (fd <= 0) {
 		return;
 	}