diff --git a/src/rez/utils/filesystem.py b/src/rez/utils/filesystem.py
index 3bd98e796..8826aa5fa 100644
--- a/src/rez/utils/filesystem.py
+++ b/src/rez/utils/filesystem.py
@@ -365,7 +365,7 @@ def to_abs(target):
 
     for name in os.listdir(path):
         linkpath = os.path.join(path, name)
-        if os.path.islink:
+        if os.path.islink(linkpath):
             source_ = os.readlink(linkpath)
             if to_abs(source_) == abs_source:
                 return name