diff --git a/user_mgr.cpp b/user_mgr.cpp
index 09d82b1..22820e1 100644
--- a/user_mgr.cpp
+++ b/user_mgr.cpp
@@ -888,7 +888,7 @@
     {};
     struct spwd* spwdPtr = nullptr;
     auto buflen = sysconf(_SC_GETPW_R_SIZE_MAX);
-    if (buflen < -1)
+    if (buflen <= 0)
     {
         // Use a default size if there is no hard limit suggested by sysconf()
         buflen = 1024;