diff --git a/installers/common.sh b/installers/common.sh
index ac47406a..472058d9 100755
--- a/installers/common.sh
+++ b/installers/common.sh
@@ -842,7 +842,7 @@ function _configure_tcp_bbr() {
 }
 
 function _check_tcp_bbr_available() {
-    if [[ "$(modinfo -F intree tcp_bbr)" == "y" ]]; then
+    if [[ "$(modinfo -F intree tcp_bbr)" =~ ^[Yy]$ ]]; then
         return 0
     else
         return 1