diff --git a/sdk_container/src/third_party/portage-stable/eclass/cmake.eclass b/sdk_container/src/third_party/portage-stable/eclass/cmake.eclass
index 643370f535..5ea90aa4da 100644
--- a/sdk_container/src/third_party/portage-stable/eclass/cmake.eclass
+++ b/sdk_container/src/third_party/portage-stable/eclass/cmake.eclass
@@ -601,6 +601,7 @@ cmake_src_configure() {
 		case "${KERNEL:-linux}" in
 			Cygwin) sysname="CYGWIN_NT-5.1" ;;
 			HPUX) sysname="HP-UX" ;;
+			Hurd) sysname="GNU" ;;
 			linux) sysname="Linux" ;;
 			Winnt)
 				sysname="Windows"