diff --git a/src/backend_firefox.c b/src/backend_firefox.c
index ac0a23f..d96bc43 100644
--- a/src/backend_firefox.c
+++ b/src/backend_firefox.c
@@ -2683,7 +2683,7 @@ backend_create (
         return -1;
     }
 
-    sqlite3 *db = db_open(conf->store_path, readonly);
+    sqlite3 *db = db_open(conf->store_path);
     if (db == NULL) {
         return -1;
     }
@@ -3150,7 +3150,7 @@ backend_mkfs (
     // See also:
     // - <https://sqlite.org/forum/forumpost/c15bf2e7df289a5f>
     // - <https://sqlite.org/forum/forumpost/680cd395b4bc97c6>
-    sqlite3 *db = db_open(conf->store_path, false);
+    sqlite3 *db = db_open(conf->store_path);
     if (db == NULL) {
         goto end;
     }
diff --git a/src/db.c b/src/db.c
index dd0664e..cc4fb37 100644
--- a/src/db.c
+++ b/src/db.c
@@ -214,26 +214,18 @@ db_fcntl (
 
 sqlite3 *
 db_open (
-    char const *path,
-    bool        readonly
+    char const *path
 ) {
     sqlite3 *db;
-    int flags = SQLITE_OPEN_READWRITE;
-    if (readonly) {
-        flags = SQLITE_OPEN_READONLY;
-    }
-    flags |= SQLITE_OPEN_EXRESCODE;
+    int flags = SQLITE_OPEN_READWRITE | SQLITE_OPEN_EXRESCODE;
     if (SQLITE_OK != sqlite3_open_v2(path, &db, flags, NULL)) {
         log_printf("sqlite3_open_v2(): %s", sqlite3_errmsg(db));
         goto fail;
     }
-    if (!readonly) {
-        if (0 != sqlite3_db_readonly(db, "main")) {
-            log_puts("cannot open database for read/write");
-            goto fail;
-        }
+    if (0 != sqlite3_db_readonly(db, "main")) {
+        log_puts("cannot open database for read/write");
+        goto fail;
     }
-
     return db;
 
   fail:
diff --git a/src/db.h b/src/db.h
index a8d99b1..629a292 100644
--- a/src/db.h
+++ b/src/db.h
@@ -113,8 +113,7 @@ db_fcntl (
 
 sqlite3 *
 db_open (
-    char const *path,
-    bool        readonly
+    char const *path
 );
 
 int