diff --git a/src/runtime/mem_windows.go b/src/runtime/mem_windows.go
index 50fca95b4f..71be0e66f0 100644
--- a/src/runtime/mem_windows.go
+++ b/src/runtime/mem_windows.go
@@ -58,9 +58,8 @@ func sysUnused(v unsafe.Pointer, n uintptr) {
 
 func sysUsed(v unsafe.Pointer, n uintptr) {
 	r := stdcall4(_VirtualAlloc, uintptr(v), n, _MEM_COMMIT, _PAGE_READWRITE)
-	if r != uintptr(v) {
-		print("runtime: VirtualAlloc of ", n, " bytes failed with errno=", getlasterror(), "\n")
-		throw("runtime: failed to commit pages")
+	if r == uintptr(v) {
+		return
 	}
 
 	// Commit failed. See SysUnused.