diff --git a/src/cache/mapping.rs b/src/cache/mapping.rs
index c18325a..7ee8768 100644
--- a/src/cache/mapping.rs
+++ b/src/cache/mapping.rs
@@ -24,6 +24,10 @@ impl Mapping {
     pub fn is_valid(&self) -> bool {
         return (self.flags & MappingFlags::Valid as u32) != 0;
     }
+
+    pub fn is_dirty(&self) -> bool {
+        return (self.flags & MappingFlags::Dirty as u32) != 0;
+    }
 }