diff --git a/src/libstore/build.cc b/src/libstore/build.cc
index 00101f553..a8c1cd565 100644
--- a/src/libstore/build.cc
+++ b/src/libstore/build.cc
@@ -4830,7 +4830,7 @@ void Worker::waitForInput()
     if (!waitingForAWhile.empty()) {
         useTimeout = true;
         if (lastWokenUp == steady_time_point::min())
-            printError("waiting for locks or build slots...");
+            printError("waiting for locks, build slots or build users...");
         if (lastWokenUp == steady_time_point::min() || lastWokenUp > before) lastWokenUp = before;
         timeout = std::max(1L,
             (long) std::chrono::duration_cast<std::chrono::seconds>(