diff --git a/bridge/bridge.c b/bridge/bridge.c
index ac4d6a14..389f1bd5 100644
--- a/bridge/bridge.c
+++ b/bridge/bridge.c
@@ -23,12 +23,11 @@ int preferred_family = AF_UNSPEC;
 int oneline;
 int show_stats;
 int show_details;
-int show_pretty;
-int color;
+static int color;
 int compress_vlans;
 int json;
 int timestamp;
-char *batch_file;
+static const char *batch_file;
 int force;
 
 static void usage(void) __attribute__((noreturn));
diff --git a/bridge/monitor.c b/bridge/monitor.c
index 82bc6b40..708a1bd2 100644
--- a/bridge/monitor.c
+++ b/bridge/monitor.c
@@ -27,7 +27,7 @@
 
 
 static void usage(void) __attribute__((noreturn));
-int prefix_banner;
+static int prefix_banner;
 
 static void usage(void)
 {