diff --git a/windows/mkwinsyscall/mkwinsyscall.go b/windows/mkwinsyscall/mkwinsyscall.go
index ff8b39d8..ed8c3ac1 100644
--- a/windows/mkwinsyscall/mkwinsyscall.go
+++ b/windows/mkwinsyscall/mkwinsyscall.go
@@ -864,6 +864,7 @@ const (
 
 var (
 	errERROR_IO_PENDING error = {{syscalldot}}Errno(errnoERROR_IO_PENDING)
+	errERROR_EINVAL error     = {{syscalldot}}EINVAL
 )
 
 // errnoErr returns common boxed Errno values, to prevent
@@ -871,7 +872,7 @@ var (
 func errnoErr(e {{syscalldot}}Errno) error {
 	switch e {
 	case 0:
-		return {{syscalldot}}EINVAL
+		return errERROR_EINVAL
 	case errnoERROR_IO_PENDING:
 		return errERROR_IO_PENDING
 	}
diff --git a/windows/registry/zsyscall_windows.go b/windows/registry/zsyscall_windows.go
index 5b02df23..fc1835d8 100644
--- a/windows/registry/zsyscall_windows.go
+++ b/windows/registry/zsyscall_windows.go
@@ -19,6 +19,7 @@ const (
 
 var (
 	errERROR_IO_PENDING error = syscall.Errno(errnoERROR_IO_PENDING)
+	errERROR_EINVAL     error = syscall.EINVAL
 )
 
 // errnoErr returns common boxed Errno values, to prevent
@@ -26,7 +27,7 @@ var (
 func errnoErr(e syscall.Errno) error {
 	switch e {
 	case 0:
-		return syscall.EINVAL
+		return errERROR_EINVAL
 	case errnoERROR_IO_PENDING:
 		return errERROR_IO_PENDING
 	}
diff --git a/windows/zsyscall_windows.go b/windows/zsyscall_windows.go
index a25f0967..f50d0373 100644
--- a/windows/zsyscall_windows.go
+++ b/windows/zsyscall_windows.go
@@ -17,6 +17,7 @@ const (
 
 var (
 	errERROR_IO_PENDING error = syscall.Errno(errnoERROR_IO_PENDING)
+	errERROR_EINVAL     error = syscall.EINVAL
 )
 
 // errnoErr returns common boxed Errno values, to prevent
@@ -24,7 +25,7 @@ var (
 func errnoErr(e syscall.Errno) error {
 	switch e {
 	case 0:
-		return syscall.EINVAL
+		return errERROR_EINVAL
 	case errnoERROR_IO_PENDING:
 		return errERROR_IO_PENDING
 	}