diff --git a/src/test/fuzz/fuzz.cpp b/src/test/fuzz/fuzz.cpp
index 974c55406..1750581c3 100644
--- a/src/test/fuzz/fuzz.cpp
+++ b/src/test/fuzz/fuzz.cpp
@@ -1,79 +1,75 @@
 // Copyright (c) 2009-2019 The Bitcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
 #include <test/fuzz/fuzz.h>
 
 #include <cstdint>
 #include <unistd.h>
 #include <vector>
 
 // Decide if main(...) should be provided:
 // * AFL needs main(...) regardless of platform.
 // * macOS handles __attribute__((weak)) main(...) poorly when linking
 //   against libFuzzer. See https://github.com/bitcoin/bitcoin/pull/18008
 //   for details.
 #if defined(__AFL_COMPILER) || !defined(MAC_OSX)
 #define PROVIDE_MAIN_FUNCTION
 #endif
 
 #if defined(PROVIDE_MAIN_FUNCTION)
 static bool read_stdin(std::vector<uint8_t> &data) {
     uint8_t buffer[1024];
     ssize_t length = 0;
     while ((length = read(STDIN_FILENO, buffer, 1024)) > 0) {
         data.insert(data.end(), buffer, buffer + length);
-
-        if (data.size() > (1 << 20)) {
-            return false;
-        }
     }
     return length == 0;
 }
 #endif
 
 // Default initialization: Override using a non-weak initialize().
 __attribute__((weak)) void initialize() {}
 
 // This function is used by libFuzzer
 extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
     const std::vector<uint8_t> input(data, data + size);
     test_one_input(input);
     return 0;
 }
 
 // This function is used by libFuzzer
 extern "C" int LLVMFuzzerInitialize(int *argc, char ***argv) {
     initialize();
     return 0;
 }
 
 #if defined(PROVIDE_MAIN_FUNCTION)
 __attribute__((weak)) int main(int argc, char **argv) {
     initialize();
 #ifdef __AFL_INIT
     // Enable AFL deferred forkserver mode. Requires compilation using
     // afl-clang-fast++. See fuzzing.md for details.
     __AFL_INIT();
 #endif
 
 #ifdef __AFL_LOOP
     // Enable AFL persistent mode. Requires compilation using afl-clang-fast++.
     // See fuzzing.md for details.
     while (__AFL_LOOP(1000)) {
         std::vector<uint8_t> buffer;
         if (!read_stdin(buffer)) {
             continue;
         }
         test_one_input(buffer);
     }
 #else
     std::vector<uint8_t> buffer;
     if (!read_stdin(buffer)) {
         return 0;
     }
     test_one_input(buffer);
 #endif
     return 0;
 }
 #endif