diff --git a/src/local.c b/src/local.c
index 04994045..c9a56ef1 100644
--- a/src/local.c
+++ b/src/local.c
@@ -1452,6 +1452,7 @@ main(int argc, char **argv)
         LOGI("using tcp fast open");
 #else
         LOGE("tcp fast open is not supported by this environment");
+        fast_open == 0;
 #endif
     }
 
diff --git a/src/server.c b/src/server.c
index b97fd2d6..70305fb7 100644
--- a/src/server.c
+++ b/src/server.c
@@ -1835,6 +1835,7 @@ main(int argc, char **argv)
         LOGI("using tcp fast open");
 #else
         LOGE("tcp fast open is not supported by this environment");
+        fast_open = 0;
 #endif
     }