diff --git a/src/why_core.nim b/src/why_core.nim
index 07cf213..b5c254e 100644
--- a/src/why_core.nim
+++ b/src/why_core.nim
@@ -57,6 +57,9 @@ proc defaultRules*(homeDir: string): seq[ProviderRule] =
     ProviderRule(name: "Mise", kind: mkContains, patterns: @[
       "mise/shims", ".local/share/mise"
     ]),
+    ProviderRule(name: "asdf", kind: mkContains, patterns: @[
+      ".asdf/shims", ".asdf/installs"
+    ]),
     ProviderRule(name: "Snap", kind: mkContains, patterns: @[
       "/snap/", "snap/bin"
     ]),
diff --git a/tests/test_why_core.nim b/tests/test_why_core.nim
index 7386cc7..316fa68 100644
--- a/tests/test_why_core.nim
+++ b/tests/test_why_core.nim
@@ -84,3 +84,12 @@ suite "whyCore":
       rules
     )
     check provider == "System"
+
+  test "asdf shim takes precedence over system path":
+    let rules = defaultRules("/home/test")
+    let provider = detectProviderByPath(
+      "/home/test/.asdf/shims/node",
+      "/usr/bin/node",
+      rules
+    )
+    check provider == "asdf"