diff -Naur orig/kcdbext.h new/kcdbext.h
--- orig/kcdbext.h	2019-08-30 11:53:28.688869013 +0000
+++ new/kcdbext.h	2019-08-30 11:53:48.996868466 +0000
@@ -1278,7 +1278,7 @@
     if (omode_ == 0) {
       set_error(_KCCODELINE_, BasicDB::Error::INVALID, "not opened");
       *sp = 0;
-      return false;
+      return 0;
     }
     if (!cache_) return db_.get(kbuf, ksiz, sp);
     size_t dvsiz = 0;