diff --git a/src/pipdeptree/_models/package.py b/src/pipdeptree/_models/package.py
index 6949abf..af98d60 100644
--- a/src/pipdeptree/_models/package.py
+++ b/src/pipdeptree/_models/package.py
@@ -226,18 +226,18 @@ def installed_version(self) -> str:
                 return v
         return self.dist.version
 
-    @property
-    def is_missing(self) -> bool:
-        return self.installed_version == self.UNKNOWN_VERSION
-
     def is_conflicting(self) -> bool:
         """If installed version conflicts with required version."""
         # unknown installed version is also considered conflicting
-        if self.installed_version == self.UNKNOWN_VERSION:
+        if self.is_missing:
             return True
 
         return self.installed_version not in self._obj.specifier
 
+    @property
+    def is_missing(self) -> bool:
+        return self.installed_version == self.UNKNOWN_VERSION
+
     def as_dict(self) -> dict[str, str]:
         return {
             "key": self.key,