bench.py: fix benchmark check

1 files changed, 1 insertions, 1 deletions

diff --git a/bench.py b/bench.py
index b440011..007dbe9 100755
--- a/bench.py
+++ b/bench.py
@@ -178,7 +178,7 @@ def main():
 
         # find Benchmark class
         for member in bench_module.__dict__.values():
-            if (isinstance(member, type)
+            if (not isinstance(member, type)
                     or member is allocbench.benchmark.Benchmark
                     or not issubclass(member, allocbench.benchmark.Benchmark)):
                 continue