diff --git a/pkgs/os-specific/linux/nixos-rebuild/nixos-rebuild.8 b/pkgs/os-specific/linux/nixos-rebuild/nixos-rebuild.8
index 279c0003c83c..3e9936d30129 100644
--- a/pkgs/os-specific/linux/nixos-rebuild/nixos-rebuild.8
+++ b/pkgs/os-specific/linux/nixos-rebuild/nixos-rebuild.8
@@ -231,7 +231,7 @@ partition.
 .It Cm build-image
 Build a disk-image variant, pre-configured for the given platform/provider.
 Select a variant with the
-.Fl --image-variant
+.Fl -image-variant
 option or run without any options to get a list of available variants.
 
 .Bd -literal -offset indent