diff --git a/winsup/utils/mingw/cygcheck.cc b/winsup/utils/mingw/cygcheck.cc
index 1dde2ecba..89a08e560 100644
--- a/winsup/utils/mingw/cygcheck.cc
+++ b/winsup/utils/mingw/cygcheck.cc
@@ -1460,6 +1460,8 @@ dump_sysinfo ()
 		    strcpy (osname, "Server 2019");
 		  else if (osversion.dwBuildNumber <= 20348)
 		    strcpy (osname, "Server 2022");
+		  else if (osversion.dwBuildNumber <= 26100)
+		    strcpy (osname, "Server 2025");
 		  else
 		    strcpy (osname, "Server 20??");
 		}