diff --git a/test/benchmarks/benchmark_compare256_rle.cc b/test/benchmarks/benchmark_compare256_rle.cc
index 33e390344d..5e6bb643c8 100644
--- a/test/benchmarks/benchmark_compare256_rle.cc
+++ b/test/benchmarks/benchmark_compare256_rle.cc
@@ -33,7 +33,7 @@ class compare256_rle: public benchmark::Fixture {
 
     void Bench(benchmark::State& state, compare256_rle_func compare256_rle) {
         int32_t match_len = (int32_t)state.range(0) - 1;
-        uint32_t len;
+        uint32_t len = 0;
 
         str2[match_len] = 0;
         for (auto _ : state) {
diff --git a/test/benchmarks/benchmark_compress.cc b/test/benchmarks/benchmark_compress.cc
index 3d63a4417c..400a7869e4 100644
--- a/test/benchmarks/benchmark_compress.cc
+++ b/test/benchmarks/benchmark_compress.cc
@@ -43,7 +43,7 @@ class compress_bench: public benchmark::Fixture {
     }
 
     void Bench(benchmark::State& state) {
-        int err;
+        int err = 0;
 
         for (auto _ : state) {
             err = PREFIX(compress)(outbuff, &maxlen, inbuff, (size_t)state.range(0));