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-rw-r--r--util/testutil.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/util/testutil.h b/util/testutil.h
index 824e655bd2..adad3fc1ea 100644
--- a/util/testutil.h
+++ b/util/testutil.h
@@ -24,7 +24,7 @@ extern std::string RandomKey(Random* rnd, int len);
// "N*compressed_fraction" bytes and return a Slice that references
// the generated data.
extern Slice CompressibleString(Random* rnd, double compressed_fraction,
- int len, std::string* dst);
+ size_t len, std::string* dst);
// A wrapper that allows injection of errors.
class ErrorEnv : public EnvWrapper {