diff --git a/crates/aster-policy/src/rule.rs b/crates/aster-policy/src/rule.rs
index 5bcc9a7..812083f 100644
--- a/crates/aster-policy/src/rule.rs
+++ b/crates/aster-policy/src/rule.rs
@@ -104,7 +104,7 @@ impl Rule {
             // also match `rmdir`.
             Match::CommandPrefix(prefix) => match line.strip_prefix(prefix.as_str()) {
                 Some("") => true,
-                Some(rest) => rest.starts_with(char::is_whitespace),
+                Some(rest) => !rest.starts_with(char::is_whitespace),
                 None => false,
             },
             Match::Path(_) => false,