diff --git a/mingw-w64-crt/lib-common/api-ms-win-net-isolation-l1-1-0.def b/mingw-w64-crt/lib-common/api-ms-win-net-isolation-l1-1-0.def
new file mode 100644
index 0000000..8e6762e
--- /dev/null
+++ b/mingw-w64-crt/lib-common/api-ms-win-net-isolation-l1-1-0.def
@@ -0,0 +1,12 @@
+LIBRARY api-ms-win-net-isolation-l1-1-0
+
+EXPORTS
+
+NetworkIsolationDiagnoseConnectFailureAndGetInfo
+NetworkIsolationEnumAppContainers
+NetworkIsolationFreeAppContainers
+NetworkIsolationGetAppContainerConfig
+NetworkIsolationRegisterForAppContainerChanges
+NetworkIsolationSetAppContainerConfig
+NetworkIsolationSetupAppContainerBinaries
+NetworkIsolationUnregisterForAppContainerChanges