diff --git a/cmds/servicemanager/Android.mk b/cmds/servicemanager/Android.mk
index 7ee0dd1..73c0367 100644
--- a/cmds/servicemanager/Android.mk
+++ b/cmds/servicemanager/Android.mk
@@ -1,7 +1,7 @@
 LOCAL_PATH:= $(call my-dir)
 
 svc_c_flags =	\
-	-Wall -Wextra \
+	-Wall -Wextra -Werror \
 
 ifneq ($(TARGET_USES_64_BIT_BINDER),true)
 ifneq ($(TARGET_IS_64_BIT),true)
diff --git a/cmds/servicemanager/binder.c b/cmds/servicemanager/binder.c
index 3d14451..9e99085 100644
--- a/cmds/servicemanager/binder.c
+++ b/cmds/servicemanager/binder.c
@@ -449,7 +449,7 @@
 }
 
 void binder_done(struct binder_state *bs,
-                 struct binder_io *msg,
+                 __unused struct binder_io *msg,
                  struct binder_io *reply)
 {
     struct {
diff --git a/cmds/servicemanager/service_manager.c b/cmds/servicemanager/service_manager.c
index 8596f96..21fdff0 100644
--- a/cmds/servicemanager/service_manager.c
+++ b/cmds/servicemanager/service_manager.c
@@ -178,7 +178,7 @@
 };
 
 
-uint32_t do_find_service(struct binder_state *bs, const uint16_t *s, size_t len, uid_t uid, pid_t spid)
+uint32_t do_find_service(const uint16_t *s, size_t len, uid_t uid, pid_t spid)
 {
     struct svcinfo *si = find_svc(s, len);
 
@@ -304,7 +304,7 @@
         if (s == NULL) {
             return -1;
         }
-        handle = do_find_service(bs, s, len, txn->sender_euid, txn->sender_pid);
+        handle = do_find_service(s, len, txn->sender_euid, txn->sender_pid);
         if (!handle)
             break;
         bio_put_ref(reply, handle);
@@ -349,7 +349,7 @@
 }
 
 
-static int audit_callback(void *data, security_class_t cls, char *buf, size_t len)
+static int audit_callback(void *data, __unused security_class_t cls, char *buf, size_t len)
 {
     struct audit_data *ad = (struct audit_data *)data;
 
@@ -362,7 +362,7 @@
     return 0;
 }
 
-int main(int argc, char **argv)
+int main()
 {
     struct binder_state *bs;