diff --git a/src/etc/snapshot.py b/src/etc/snapshot.py
index 5d1a448749a..1e56c274d80 100644
--- a/src/etc/snapshot.py
+++ b/src/etc/snapshot.py
@@ -34,7 +34,7 @@ snapshot_files = {
               "lib/libcore-*.dylib",
               "lib/libstd-*.dylib",
               "lib/librustc-*.dylib",
-              "lib/librustsyntax-*.so",
+              "lib/librustsyntax-*.dylib",
               "lib/librustrt.dylib",
               "lib/librustllvm.dylib"],
     "winnt": ["bin/rustc.exe",