diff --git a/src/runtime/os_windows.go b/src/runtime/os_windows.go
index e70944cb39f..9497a600fe2 100644
--- a/src/runtime/os_windows.go
+++ b/src/runtime/os_windows.go
@@ -4,6 +4,8 @@
 
 package runtime
 
+import _ "unsafe"
+
 type stdFunction *byte
 
 //go:linkname os_sigpipe os.sigpipe