diff --git a/post-process-pe.c b/post-process-pe.c
index 7083d3e22..8a4794e67 100644
--- a/post-process-pe.c
+++ b/post-process-pe.c
@@ -541,7 +541,10 @@ int main(int argc, char **argv)
 		{.name = "enable-nx-compat",
 		 .val = 'n',
 		},
-		{.name = "ms-validation",
+		{.name = "disable ms-validation",
+		 .val = 'M',
+		},
+		{.name = "enable ms-validation",
 		 .val = 'm',
 		},
 		{.name = "quiet",