diff --git a/benchmarks/Benchmark_IO.cc b/benchmarks/Benchmark_IO.cc
index 76a2375f..0d80d425 100644
--- a/benchmarks/Benchmark_IO.cc
+++ b/benchmarks/Benchmark_IO.cc
@@ -6,7 +6,7 @@
 #endif
 
 #ifndef BENCH_IO_LMAX
-#define BENCH_IO_LMAX 48
+#define BENCH_IO_LMAX 32
 #endif
 
 #ifndef BENCH_IO_NPASS